CAFTA Change History
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
CAFTA
6.0 (12/12/12)
5.4 (02/03/09)
5.3 (12/21/07)
5.2 (05/06/05)
5.1aR2 (12/11/03)
5.1a (09/12/03)
Version 5.1 (10/10/03)
version 5.0a (05/20/03)
version 4.0b (09/15/00) AppB
version 4.0a (9/11/00) [demo only]
version 4.0 (7/21/00)
version 3.2c (8/7/98) [personal only]
version 3.2b (5/8/97) AppB
version 3.2 (11/14/96)
version 3.1a (8/22/95)
version 3.1 (8/7/95)
CAFTA 6.0
New main GUI
The main GUI of CAFTA has been upgraded. This includes:


Project Workspace
Toolbar buttons were added to the workspace:
- Display and Edit Project or File Properties (depending on selection)
- Add a file
- Delete a file
- Add a folder
Main Document Area
The document views were changed to work as tabbed documents using the new
framework. This includes new features for controlling the tabs, including the user
controls splitting of the tabs into groups.
Data panels
New panels are on the right side of the main document screen. They use automatic features of the
framework, including auto hiding, pinning, grouping, and floating. The panels display information
that changes as the user moves around the tree. The user is able to edit information from there.
Properties Panel
The properties pane will show a property grid for the currently selected item. This will allow
editing of the data, will be a subset of data which can be edited from the normal edit dialogs.
The properties panel will support the following objects:
o
Fault tree basic events
o
Fault tree gates
o
Basic events in cutsets
o
o
o
o
Cutsets
Event tree branches
Event tree sequences
Event tree events.
Gate Tops
When displaying a fault tree, this displays the top gates for the current fault tree file, along
with any true/false state of the gates. Double clicking on the gate and the screen will jump to
that gate.
Parents
When displaying a fault tree, this will display the parent gates for the current event, along
with any true/false state of the gates. Double clicking on the gate will cause the screen to
jump to that gate.
Output panels
At the bottom of the screen are additional panels used for outputs from various CAFTA
processes. Where appropriate, these panels will include the ability to link to the relevant
information. Implemented panels include:
o
o
Find Results: This provides the output from the “Find in Files” feature. The find
and replace feature contains a toolbar that allows the user to select various options in
a project allowing them to Find and Replace elements in that project.
Warnings: The Warning tab will show warnings about the current
document. For this version, this includes the tests for circular logic, missing event
basic event data, and module independence
Fault Tree Editor

Fault tree reporting improvements include page numbers of file-based FT
graphics.
Cutset Editor

Cutset description display improvement
Event Tree Editor
Changed to ET-Centric Design where the user builds the model by starting with the event
trees. The two main actions support the linking of ETs to other ETs to support modularly
extending the main ET and to allow the creation of FTs that extend existing branches in the
ET.
ET Branch Linking
o
You can create a new Fault Tree to link to an Event Tree branch, and link the Event
Tree branch to an existing Fault Tree The user can also modify an existing Event
Tree branch link to perform either of the above functions.
o
Quantifies individual sequences from event tree editor
o
Event Tree to Event tree linking and branch linking
o
You can double-click on the desired branch or use the right mouse button. The data
entered here overrides any data entered for the event.
The Event Tree Link Dialog
The ET Sequence Link dialog is used in the same way that the ET Branch and Event dialogs were. The
only significant difference is that each event tree will only have one initiator, so the combo box and radio
group for selecting which initiators to display does not appear.
o
ET Branch FT Link Icons
When a FT Link is assigned to an ET branch, it is indicated in the ET editor using a
graphical icon that indicates the kind of structure linked to. This is currently limited to
FTs. The icon is the same as the icon used in the Project tree view. The icon is shown
below the branch, to the left of where the branch probability is or would be displayed.
Other Changes









Browser to Event Tree editor
Browser to Status Panel
Consistency checks of Basic Event uncertainly parameters
New automation functions have been added to the Application Object.
Removed obsolete DOS-style control keys for manipulating the event tree view.
Print to RTF matches “Report” print out
The Btrieve file format is no longer supported.
Added alpha staggered method for Common Cause Failure Calculations
Several changes on Equations, Support of International Format for Equations, Speed of Equation
Calculation (more info provided upon request and soon in Knowledge Base Article).
Why your results may be different from previous versions
As computers have become faster, some of the approximations that are inherent in the calculations can be
relaxed and thus the software can provide a more accurate approximation of the true top event probability.
Previous versions of CAFTA relied on the initiator frequency being small, so that the initiator could be
approximated as a probability. In this version of CAFTA, additional calculations are performed to account
for initiator events.
When used with a model that contains initiators, the cutset top event calculation is now factored by the
initiator. The total probability is calculated separately for each initiator, and then the results are added
together to lead to the overall total probability.
When used in typical applications where probabilities are small, you will probably not notice a difference
in the result. However, if your probabilities are large, this can have a noticeable impact. For example,
suppose you have the following cutsets:
C1 = I * A * B
C2 = I * A * C
Where “I” is an initiator, and Freq(I) = .1, P(A) = .2, P(B) = .3, P(C) = .4. The calculation in the previous
version of CAFTA would be:
Freq(Top) = (I * A * B) + (I * A * C) - (I * A * B) * (I * A * C) = .006 + .008 - .006*.008 =
.013952
With the new calculation, this is:
Freq(Top) = I * [(A * B) + (A * C) - (A * B) * (A * C)] = .1 * [.06 + .08 - .06*.08] = .013520
The new calculation is still conservative, but even with these large probabilities the amount of conservatism
has been reduced by only a small amount. With cutsets containing smaller probabilities, the difference in
the results will be less.
In most cases, the new result will be less than the result produced by the previous version of CAFTA. In a
few special cases the result might increase. This will happen, for example, when you have large initiator
frequencies or a large amount of dependence between the cutsets. For example, if you have the following
cutsets:
C1 = I1 * A * B
C2 = I2 * A * C
Where “I1” and “I2” are initiators, and Freq(I1) = .1, Freq(I2) = .1, P(A) = .2, P(B) = .3, P(C) = .4. The
calculation in the previous version of CAFTA would be:
Freq(Top) = (I1 * A * B) + (I2 * A * C) - (I1 * A * B) * (I2 * A * C) = .006 + .008 - .006*.008 = .013952
With the new calculation, this is:
Freq(Top) = I1 * (A * B) + I2 * (A * C) = .006 + .008 = .014000
When using a model that contains only normal Boolean basic events (no initiators), the cutset top-event
calculation will normally lead to the same result as before:
Since the specifics of the calculation have changed a little, it is possible that the results will be slightly
different from the previous version of the software in the 7 th decimal digit.
If your model includes some cutsets that contain an initiator, and some do not, the resulting top event value
is meaningless. To maintain compatibility with previous versions of CAFTA, the total frequency (of the
cutsets containing initiators) is added to the total probability (of the cutsets that do not have initiators).
CAFTA 5.4
Numeric changes
Due to improvements in the calculations, you may get slightly different results than the previous version of
CAFTA in some limited circumstances. This will happen in the following cases:
 The numeric accuracy of the basic event probabilities for calc types 3 and 5 has been
improved when the calculated probability is very small. A small difference (usually in the 4 th
or lower significant digit) will be visible for probabilities less than about 1E-13 for calc type
3, and 1E-7 for calc type 5.

The min-cut calculation uses a more accurate calculation when the top event probability is
very small. You may see a difference in the 4 th or lower significant digit for top event values
between about 1E-11 and 1E-13.

The interface to quantification engines would sometimes lose one bit of precision, causing a
very small difference in the 6th or lower significant digit when compared to earlier versions of
CAFTA. This has been corrected.
Database Editor

Memo fields in the database are now fully supported.

Database field names can now be longer than 10 characters.

Database editor now includes a normal scroll bar when using Microsoft Access format (*.rr)
files.

Variables are now supported in the CCF alpha method, and the CCF report has been
improved.
Fault Tree Editor

The FT cross reference can now be copied to the clipboard from the Group Pages window.

You can now drag an event from the database (or from MSWord) into a fault tree.

Added display options to turn on/off corner clips (improves display speed on large models).

Added new menu item to apply flag files directly, instead of requiring a merge and then
manually setting the flag states.

Fault Tree rate and exposure information will now display only if the calculation type uses
those values.

Added new features to the Style window to set the rounded, thick, and “none” options.

The order of evaluation has been changed to process mutually exclusive events before
recovery rules.
Cutset Editor

Added Browse mode to see the effects of the cutset on the fault tree. See the help file for
more information.
QRecover

Corrected problems in replacing events when the criteria depended on events that were added
in a previous rule.

Added the following new rules:
**SORT**
**SET EVENTS TRUE**
**SET EVENTS FALSE**
**SET EVENTS UNKNOWN**
**SET ONES TO TRUE**
**SET ONES TO UNKNOWN**
**LOAD DATABASE**
**MARK AS INITIATOR**

The **RECOVERY** and **REPLACE EVENTS** rules now support a missing probability
value. In this case, the probability will be obtained from the database.

The **TRUNCATION** rule now has an option to reset to the original truncation value.

The **MISSION TIME EVENTS** rule now supports 15 entries.

Better support for PRAQuant (passes project to the QNT file).

Better integration with DocAssist (handling of the DocAssist database filename).

Project window is processed faster when you have a very large number of fault tree files.

Added support for opening the database as read-only via the API (will be used by future
versions of EOOS, etc.).

Updated the sample databases and templates to Access 2000.
General
Filter support

Better reading of Saphire files (e.g. support of ‘S’ type).

Corrected a problem in reading NUPRA 3.1 files when they contain large sequence numbers
on the first line, and handling of space in top event name.

Now supports RiskSpectrum continuation gates on XOR and COM.

Corrected a problem in reading RiskSpectrum alternate branch names that would rarely cause
CAFTA to think that the tree contained 3-way branches.

Quoted text is now supported in the free format database import/export.
Bug Fixes

Fault tree display would fail (crash) after many screen refreshes. Display was also very slow
(apparent lockup) on certain large fault trees.

Saving the fault tree after PrintToRTF could overwrite caf file with rtf in some cases.

Spurious “Drawing BitBlt Failed” message would show when returning from locking the
computer.

Spurious “database not found” errors would appear after evaluate because of problem in
quantification engine and relative path calculation problems.

Fault tree printout cross-reference table would have entries overlap each other on the last
page.

Drawing of fault tree would skip some horizontal lines when more than 7 levels were
displayed.

CAFTA could crash when generating cutsets with no truncation set (blank value) if no
database is attached to the Fault Tree.

Cutset divider lines would cause the Cutset Editor to operate erratically.

Cutset compress could crash in certain cases.

Fields that exist in BE or GT table and are added as custom fields to the TC table would not
appear in the User Data Custom Fields tab.

<Del> key caused event or description edit box edit to complete.

Basic event edit dialog could give errors messages from validating hidden fields.

Summary info display was counting cutset initiators incorrectly.

Ctrl-Home in Cutset Editor would not go to the top of file in all cases.

CAFTA would not accept a comma "," in equation or direct value when regional settings are
set to European (Spanish) format.
A number of other minor display bugs were also corrected.
CAFTA 5.3
General

The help file is now in the CHM format

The Btrieve driver check now only occurs if you open a Btrieve file. This will allow the
software to run with lower privileges for most users.

Installation now supports isolated assemblies.

You no longer need to perform additional manual steps to install under Vista
Fault Tree Editor

The Extract Subtree function has been changed to create a new fault tree window. This
prevents the problem of inadvertently saving an extracted subtree over top of the original file.

The find dialog now allows you to find by description or any other database field. The find
result will now display correctly if the found event is a basic event input to a collapsed gate.

The software now keeps multiple levels of undo information (default is 5 levels).

Text format flag files are now supported including comment lines.

A new option has been added to allow users to verify that all transfers have been resolved.

The function to apply CCF events to the tree has been changed to operate correctly when a
basic event appears in more than one place in the tree. It also now supports more than 10
events in a group.

Added ability to identify what part of the gate/basic event names represent the system code.

Added an "Auto" configuration to the gate naming scheme, which will make the new gate
system code match the code of the parent gate.

Event "comments" (from the Notes field in the database) are now displayed as corner clips,
and you can view the comments when you mouse over the corner clip.

Added the ability to right click an event and set the style for the event.

Added an expand/collapse box to the display of the tree.

Added the ability to change the standard size of the description boxes.

The find & replace has been updated to support adding characters at the beginning or the end
of a name. For example, you can now change “*” to “*A”.

Evaluate Improvements

o
Quantification configurations can now be added by simply copying a file from
the quantification engine vendor to the CAFTA application folder.
o
The evaluation process has been expanded to include the ability to set flag files,
recovery rule files, and mutually exclusive files
o
The quantification process now defaults to expanding CCF events
Printing Improvements
o
You now has the ability to copy the currently displayed fault tree view to the
clipboard, by right-clicking on the blank area surrounding a fault tree
o
Copy to clipboard now defaults to Enhanced Metafile (EMF) format instead of
the standard WMF format. The text is now more easily edited in Microsoft
Word. There is also an option to copy as RTF Graphics
o
You now print to RTF from the File->Print to RTF menu item instead of doing a
SaveAs. Writing a file as an RTF format no longer prints random pages when
there are gaps in the page numbers, and prints the pages in the proper order.
o
The ability to integrate fault tree graphics into user reports has been improved
by new options to set the page prefix, starting page number, recognition of the
system prefix, and pagination by system
o

Fixed problems with color output on RTF files, in both RTF graphics and
metafile formats. Improved RTF graphics output for object bounding rectangles
and other technical issues that make it easier to edit the graphics in Word or
Powerpoint.
Other minor improvements
o
Fixed the find dialog so that the find string is not limited to the width of the edit
box.
o
The basic event edit dialog will now allow you to use variables or type codes
that begin with a digit, as long as the variable or type code is defined somewhere
in the database.
o
Made improvements to the operation when adding events to existing
equivalence gates.
o
Problems evaluating a model when the top gate was an XOR have been
corrected.
o
Tab character is no longer allowed in event names.
o
In certain cases the xref pages would all be written onto a single page. This has
been fixed.
o
The standard quantification configuration to will now always remove comment
events independent of the quantification optimization options.
o
If you are editing a name or description, then switch to another application, upon
return, the text will no longer show an odd font.
o
The current focus no longer jumps to the project window after certain
commands.
o
The summary info screen now shows the counts of gates by gate type.
Cutset Editor

The cutset display has been improved, including better font handling, options to wrap or
unwrap, and new options to display the cutset count, the percent contribution, the cumulative
contribution, and to change the displayed precision.

Improvements have been made that allow for handling much larger cutset files. The
limitations depend on a number of factors, but the typical limit on cutsets has been increased
from about 2 million to about 6 million cutsets.

The cutset files are now handled like documents (same as fault trees), which allows for other
programs such as the FT Browser or PRAQuant to use the cutset files while it is open for
display in the cutset editor. This also prevents problems of the software saving changes
without warning when printing a report or switching modules.

The pie chart display calculation has been improved to factor the results by initiator and to
show a total value. This will lead to slightly different results than the previous version of
CAFTA when using higher probability events.

The ability to apply recovery rules to cutsets after evaluation has been added.

Added a new “filter view” of a set of cutsets, which includes the ability to compare two cutset
files.

Display font name and size is controlled only by the "Normal" font

Display scroll now keeps current event in position to allow for cross-page selections

Other minor Improvements
o
Fixed the find dialog so that the find string is not limited to the width of the edit
box. This enables find operation with more combinations of events
o
Cutset modules will now be built in the same order as quantified. This will
cause the "default" module to display to be the first module solved.
o
The cutset importances and piechart windows will no longer fail if the windows
are made too small
o
Added shift-F3 to perform a “find previous”.
Database Editor

The F3 shortcut has been added for Find-Next

Fixed a bug that caused crashes when the database editor was maximized on large screens.

The CCF information can now be stored in a separate CCF table, making it easier to interface
the software to other tools.

The database template has been changed to have proper field widths in the TC table, and the
link fields have been changed to memo type.
Event Tree Editor

Made the link capability work like it does in the Fault Tree Editor. The define and goto links
are removed from the right click menu and are now on the item (event/branch/sequence)
dialog only. You can make multiple links of the same type. The link edit button is no longer
disabled on the sequence dialog.
Project support

The software has been updated to support more than 100 files in the project.

New option allows you to automatically save the project file whenever it changes. This
prevents user from forgetting to save the project file.

The most recently used file list is now separated between project files and other files.

The database purge feature will now create a backup and compact the updated database, if it is
in RR format and is not currently open by another window.
Filter support

The NUPRA filter has been updated to support NUPRA version 3.1 and now correctly loads
external transfer descriptions.
Add-in Support

Add-ins can now install configuration information. This allows you to configure new add-ins
by simply copying the add-in into the proper CAFTA folder (.\addins).

A new method has been added so that add-ins can save and restore undo information.
CAFTA 5.2
05/06/05
Release Notes:
General

Added AutoSave feature. Will save the file based on a timer. The autosave file will be stored in
the temp directory with the name is <filename><xxxx>.Autosave where xxxx will be a sequential
number. CAFTA will currently provide no direct recovery, but the file can be manually copied.

Display the current opened database on the status bar (FT & CS). Double clicking on the name
will open the database in the editor. Also added a menu item to open the current database.

Added ability to define the component ID encoding on the type code settings dialog.

Bugs & Minor features
o
o
o
o
Corrected error messages one would get the Access database fields were
numeric instead of character (if blank data was attempted to be stored).
Added support for international numeric formats
 In international settings, the software will accept user input as US or the
international format. For any calculated number, the international
format will be used. Note that data entered into the database using an
international format will not be readable on US-only systems. The filters
generally do not use international formats.
Added Alt-Tab to toggle between open windows
(see TestTrack for more items)
Project Changes

Added Project create wizard so that users can create a database and fault tree, and save the
project, in one step.
o
Combined the File New Project with the File New for Trees, Databases etc.

Allows the user to open an “RR” database file using Microsoft Access. (right click menu).

Now displays the Btrieve databases on one line.
Fault Tree Changes

Replicate subtree. Presents a find and replace like dialog with patterns to use in converting the
currently selected gate to a new subtree. The new gate will be placed next to the original. The
process will stop at any gate which does not match the pattern. It will not create the subtree if
gates will conflict with existing gates in the tree. A warning will be given identifying the problem
gates. If automatic descriptions from the TC information is enabled, new descriptions will be
created.

Copy/paste will also copy the database information when pasting to a tree using a different
database.
o
o
The drag and drop will also copy database information.
The merge will also copy database information.
o
(This is done by making a global copy of the subtree and putting a copy of the
handle on the clipboard under a private format. On the paste this copied subtree
used to merge the tree and the new RDMergeEvent function is used to copy the
database information if the database if different. )

Simplified the information shown when user creates a new fault tree

User can now evaluate a selected gate (right click or via evaluate dialog).

Added new basic event symbols for maintenance, human and comment events.

Updated the evaluate dialog.
o
o
o
o

Add mission time override, this override is stored with CAF3 files as part of the
evaluate information. It will override the value of the MT variable if defined.
Changed the way that module expansion is labeled
Allows quantification of a single gate, gate name appears on the evaluation type
drop down.
Add optimize setting to remove comment basic events, calls
FTCompressCommentEvents.
Bugs & Minor features
o
o
o
o
o
Fixed problem with using file extensions in the run name when quantifying
Added Font Substitution support. If you increase the scale for trees using Small
Fonts, it will replace it with Arial, and similarly, when shrinking a tree with Arial,
it will replace it with Small Fonts
Connector line for INH/PAG was not being drawn when condition event was an
arrow-type.
Lambda/tau will now not show if they are not relevant
Display options now use check list boxes
Other Changes

Updated the CCF Tool to be easier to use.

Add-Ins:Made the following add-ins “In-the-box”:


WinPurge

Initiator Pie Chart

Importance Table
Obsolete FTQuant.fil filter has been deleted.
Database Changes

Fixed masking bug in DB editor (Double click and events are gone)

Added User-Defined Calculation Types

Update the basic event editing dialog.
o
o
o
o
o
o
Remove the typecode tab, now will edit the type thought the basic event data
tab.
Field enabling is more tightly coupled to the calc type - only necessary fields are
show (includes values, equation, etc.)
Clicking on the button next to the failure rate when bring up the list of available
type codes, similar to the dialog for variables used in the factor.
Clicking on the variable/type code data will edit the data
Probability field is more clearly shown, and includes color for status
Corrected problems where some fields were missing from the database

Add Bayes data tab, allows Bayesian update of basic event data.

Add support for overrides which will temporarily supersede a variable value in the database.

Added ability to include other database fields in an equation (BE table only), e.g. %SOURCE%

%RATE% in equations now will support type codes containing spaces and other punctuation.

Database import can now import all tables in one step for MAR-D files
Event Trees

Fixed bugs associated with deleting branches

Creating a fault tree now opens the open tree just created

Navigating from an event tree branch to the associated fault tree now opens the tree in the same
CAFTA instance

Display options now use check list boxes
Cutset Changes

Fixed bugs associated with loading probabilities when using equations.

Aesthetic changes, class field is now wider and gray, less wasted space between columns.
API level changes

Added stock properties to OCX’s (mouse up/down/move, keypress/up/down) so that right mouse
clicks can be processed correctly
CAFTA 5.1a Release 2
12/11/03
Release Notes
This patch release of CAFTA updates the fault tree API (FTAPI32.DLL). The following issues have
been addressed:
" Basic event data missing when save to an RTF file. The first item shows, but the others do not.
" Drag/copy onto an event when the vertical scroll is at the bottom gets confused. It does not
know that the screen is scrolled, and can drag to the wrong or no event.
" Double basic event symbols do not draw as double. Circle and oval work correctly, but the
others do not.
" If you select a gate from the Show Parents (jump) dialog with a gate index > 32000 will fail
with message "Invalid gate index".
Note: We also added an "Overrun" field under "View / Display". Normally set to1 it lets the user
decides how much extra space CAFTA will display at the bottom of the page. It is counted in halfcell height (a cell being the dashed boxed around a Basic Event). This was intended for users for
do not want to use dynamic paging and would like to see more of the tree on one single page.
Maximum is 99 (approximately 50 cells) which often displays the whole tree on one page. (The
vertical scroll bar allows to see the tree on one page).
CAFTA 5.1a Changes
(#2520) - In Cutset Description report, rate may be incorrect.
(#2525) - Fixed problem with old databases that do not contain an EQUATION field. If the
database does not contain the EQUATION field, the BE edit dialog will incorrectly detect this and
change the calculation type to equation.
Changes for CAFTA version 5.1

Cutset editor display problems were causing "find" to find the position the cursor to the
wrong point (#2412), the scroll position to change during screen refreshes, and the cursor to
sometimes think it was on a different event than it was actually on.

In certain cases, the fault tree would print too far to the left of the page (#2044) or too high
on the page (#2046, #2383). For wide trees, such as printing the entire tree on one page,
random lines would appear. Also, decreased the inner margin to make the tree use the available
page space better.

Corrected a risk of losing data by incorrectly saving to an RTF file (#2421)

Fault tree display issues:
-
Improvements to the rounding of the exposure times in FT displays
-
BE probability labels are now shown in red if there is an error
In certain cases with wide displays and the user presses "PageUp" key, the show tops dialog
box would be placed off-screen (#2452)
The basic event edit dialog is no longer missing the symbol type dropdown when no data
had yet been entered for the event.
-
Dropdown list for minutes and seconds in the basic event dialog were reversed. (#2435)
-
Prune modules will no longer fail if > 32767 gates in the tree

Fault tree print issues:
-
When gates more than 3 parent transfers, the "see x-ref" display was wrong
Title would not fit into the title box if the file path was very long. (the filename is now
abbreviated using the standard Windows logic if the name is > 48 chars.) (#1825)
In fault tree printouts, changed "Drawing number" to "Page Number". Also, if page
numbers are not set, the page label is no longer output ("Page ")
-
Fault Tree Editor would crash when printing more than 3000 pages
-
Improved reports

Cutset Issues:
Creating cutset report by initiator, twice in a row on different modules, would give incorrect
results. (#2416)
-
Added multi-event find capability to the cutset editor Find function
Improved reports, in particular more information is provided on the “Cutsets with
Descriptions” report.

Project related issues:
-
Files of type ".mutx" would not show up in template list (#2394)
-
MDB files added to the project list would open as hidden when you double clicked on them
-
Project list now supports ESD's and FID's.
Unknown document types that contain spaces will now start correctly from double clicking in
the project window.
fixed problems where project menus were enabled incorrectly (e.g. right cick on a folder that
has no files, Remove the first time entering CAFTA)

Event tree issues:
When using a metafile version of the event tree (e.g. paste to Word), multi-line text now
wraps correctly.
Corrected bug where if you load the branch probabilities, and the database was in an Access
format, then subsequent tree edits would fail.
-
The event tree filter list in the cafta.ini no longer requires a particular order.

Filter related issues:
Reading certain old format fault tree files would leave the font not set, leading to an
unexpected default font.
-
Reading cutset RAW files would not report the quantification time
-
"Unable to open file" if save cutset file with multiple modules as free formatted (#1831)
-
Several special-case input issues were corrected in the less common used cutset filters

Database and Data issues:
Added support for quoting variable names in equations using single-quotes. This enables
support for basic event names that begin with a number or contain operator characters such as a
dash.
Improved error trapping on incorrect inputs to the basic event edit dialog, and trapping of
data error before evaluation.
Corrected anomalies in the database editor report dialog (e.g. when click on print to file,
then press cancel, it continued to the file selection dialog).
The "variable" edit screen labels were confusing, referring to type codes and rates. Also, the
software now forces new variable names to uppercase.

CCF Tool issues:
When run from the database editor, it might report that the group can not be longer than -3
chars
-
Spurious "record not found" error messages would be reported
-
The "add to fault tree" button did not function

Toolbars:
In certain cases the toolbar settings in the registry would get corrupted, preventing CAFTA
from starting up.
-
The toolbar height was off by two pixels on the opening screen.

Miscellaneous:
-
CAFTA will now support filename paths > 128 characters
Btrieve database filename paths that contain accented (foreign language) characters are
now supported
Enhancements to support PRAQuant positioning the display to a selected gate or cutset
module (in the DDE logic)
-
GTPROB was not able to support more than 9,999 gates + basic events (#2328)
There was a problem with the installation, when user enters incorrect name/passkey, the
system would install as demo mode with no message.

API programming changes:
FTCanMerge API function not returning correct error codes (only affects utility programs)
(#2396)
-
FTCompare API function no longer reports a different order as a difference.
-
FT OCX would sometimes fail (div by zero) when opening a file.
-
Project-level add-in menus now call project functions instead of fault tree functions
-
Right-click add-in menus are no longer added to the general menu
-
Automation support has been added
-
Added "Close All" menu item
Changes for CAFTA version 5.0a
New Features
General

Added new integration environment. The formerly separate programs (FTED, CSED, RDED)
now appear in a single window. Many of the features of PSAProject have also been incorporated
into a "project window".

Added first-time users welcome screen and Tip of the Day

Added links to ePSA (requires the installation of ePSA)

Updated database template to use Access 2000. Made Btrieve and Access database
templates the same and complete (e.g. including "V" field)

Added new automation-based addin capability to menus, including the right-click menu

When creating files from a template, the default save directory is now the same as the
project directory (if any). Previously, the default directory would be the template directory on
certain operating systems (e.g. XP), making it easy for a user to accidentally overwrite a template
file.
Fault Tree Editor

Added a vertical scroll bar so that the user can scroll down to staggered gates

New function to create a gate above the current gate. This "insert level" is now available on
the toolbar.

Added support for proportional scrollbars.

Showing the parent of an event now includes indicators as to whether the event is true or
false.

Added the old "F4" functionality from the DOS version. This function allows you to copy a
generic description from the TC to a basic event, and is now a button on the Basic Event edit
dialog. Added support for F4 key parameters in Access-formatted files. Now will read & write the
unique code.

Added variable picking Basic Event edit dialog.

Removed a 200-character limit on filenames

Removed the artificial limit of 100 on the number of gates input to a tree to allow for API
manipulations of larger fault trees

Improved handling of the zoom toolbar dropdown

CAFTA will now compress any true/false before evaluating (cutsets or GTProb)
Evaluation Process

Evaluation process can now incorporate a flag file specification

Removed the limit of truncation order <= 6. Now unlimited.
Cutset Editor

Added support for proportional scrollbars.

Cutset reports now remember the proper paper orientation
Database

The database operations are now much faster, particularly for databases in Access2000
format.

Corrected problem scrolling when using Access file format and the basic event names
contain dashes or other special characters.

Maximum record length has been increased from 1024 to 8192 bytes

The database will now support memo fields. Only the first 2000 characters of a memo field
are supported (which is included in the "record length")

Database now synchronizes better with data changed in other processes. Added a "Refresh"
menu item to verify the synchronization. Selecting the "home" scroll button also forces a refresh
of the data.

You can now add new events to the database without entering a value for the other data
fields.

Probability field now shows in a gray background, and improved error messages

Database table display now supports the <del> key to delete the current cell value. The Ctrlend combination moves to the last row, but no longer goes to the last column of the table.

The database table no longer scrolls so fast, so that you can scroll up or down a single line.

Added tooltips to the BE edit dialog
Calculations

Basic event factor field and type code rate field can contain a "variable" name instead of a
value. The variable name is a value stored in the type code table. For example, if a set of
equipment has the same test interval, you can set the factor field to "PMPTEST", and add
PMPTEST to the TC table, placing the test interval into the "rate" field. Or, if you have a common
mission time, you can set "MT" into the factor field, and define the mission time in the TC table.

A new field can be added to the Type Code table ("V") that if set to a value of "V" indicates
a variable instead of a regular component type. This is just used to help the user distinguish
between these two uses.

Added new units "S" for seconds and "I" for minutes.

There are three new calculation types:

"+" meaning always "true"

"-" meaning always "false"

"=" meaning use the equation field
Filters

Added new Safety Monitor filters

Numerous improvements to the Risk Spectrum (Windows) filters

New fault tree files created via the API now default to maximum event name length of 31
characters

The logic that was previously in ftcompile and cscompile is now included in the base API.
Bugs Fixed
General

Corrected INT10h (math coprocessor) error that happened on certain computers when
displaying fault tree logic containing single input gates (this was previously provided as a patch).

Fixed minor problems about the persistence of the application windows location
Fault Tree Editor

Fixed problem where the horizontal scroll bar could not be moved to the left of center.

Corrected crashes relating to setting the type code scheme. [1938]

Corrected crash when creating a new tree top in the Edit Input from the tabular display
mode.

Corrected crash when on opening the Group Pages dialog and certain printing operations
when the maximum event name length was set to 31 characters. [1971]

Corrected problem where the Edit,Find radio buttons were being applied on Edit,Replace
[1973]

Correct crash when previewing report options for tabular display.

Fixed problems (memory leak, unexpected operation) when changing the database in the
Tools, Summary dialog [2293]

Corrected crash when using the Print toolbar button before any report had been printed.

Corrected crash when using the "Show Parents" dialog when the event name had > 24
characters [2299]

Fixed problems when cursor ends up at the wrong spot after certain types of deletes in
tabular mode

Special logic now prevents the user from saving a fault tree file to a .ldb extension. (this
could happen with the Win2000 type-ahead feature)

The Type Code Setting dialog box now shows the correct basic event name as the sample.
Evaluation Process

Removed error message "Invalid event name" that would sometimes occur when generating
cutsets for trees with XOR gates.

Corrected problem with incorrect cutset results when using XOR gates with more than two
inputs (this was previously provided as a patch).
Cutset Editor

Corrected bug where equations were not processed when loading database probabilities

Corrected bug where in certain cases the software would crash when editing an event data if
the database was not open

Correct bug where in certain cases double clicking an event would not open the event.

Fixed problems when cursor ends up at the wrong spot after certain types of deletes.

Fixed problem where reports for classes and for initiators would not print to files nor
clipboard.
Database Editor

Corrected a few places that would not allow quotes in event names or field texts.

Problems with the database editor window when using MSAccess-formatted files (e.g. cursor
moves to wrong point) have been corrected.

Corrected bug where double clicking certain records in Btrieve files would do nothing.

Failure to open a database now reports an error message, instead of just returning to the
open database dialog box.

Unused "Save" and "SaveAs" menus have been removed.

On export, fixed bug where it would not work properly if the export filters were in the wrong
order in the cafta.ini file.

- Incorrect distribution labels have been corrected.
Filters

Minor problems corrected with the MAR-D filter (continuations and negated input lists). Also
now reads additional basic event data, not just the probabilities. Extra line feeds no longer show
in the output.

Corrected failure of free-format input when there is only one gate defined, and now works if
the second token of a continuation line begins with a number.
CQUANT

Corrects the previously reported problem notice regarding incorrect cutsets in certain lowmemory situations.
GTPROB

Will no longer crash if the internal table becomes empty (e.g. when using a truncation of
1.0). Also made minor improvements to the display text.
API

Now prevents crashes due to fault tree titles being set too long

Certain functions (e.g. CSSetDatabaseName) have been corrected to not modify the input
arguments.

Previously, a change to the database (using Access format) would reset the
GetFirstEvent/GetNextEvent loop back to the beginning of the file.

RDExtractTC will no longer crash if you pass a string longer than 100 characters
Removed the case-sensitivity in the few remaining places where it was a problem
Changes for CAFTA version 4.0b
General



Installation now gets the default Program files path from windows. This is to support
international version of CAFTA.
Improved calculation of column widths in reports, so that it is less likely to overwrite
fields.
Now gives correct message if no template is selected when you press OK on the template
selection dialog.
Fault Tree Editor




Added TypeCode setting option. Can now change the database type code mapping
directly from the fault tree editor.
Fixed problem with drawing of certain fault trees that contain circular logic.
Corrected problem in the display options dialog related to the selection of fields to display
next to events.
The date printed on fault tree printouts is now set to the last saved file date. The date
can be changed from the print options dialog.



Gates set as print stops now print correctly.
Fixed print problem when print the tree on one page was selected and when no pages
were select to print.
Fixed problem in the fault tree sort function.
Cutset Editor





Removed Module Bar option from the menu, since the module combo box is now located
on the tool bar.
Corrected several problems with the module operations import feature.
When sorting cutsets by class, now places them in ascending order.
Fixed number of problems in cutset reports including importance reports with all modules
selected, cutset sorting with all modules selected, and option to include inactive cutsets
in the report.
Fixed problems when pasting cutsets from the clipboard. Now does not require cutset
probabilities and tabs between events.
Database Editor



Fixed problems related to editing/deleting/coping the first record in the database. Also
will now prevent double clicking on the header bar or when the database is empty.
The status bar is now updated after changes are made to basic event data.
The correct file location is now maintained after performing a find which generates no
results.
Printing from the print preview screen now works correctly.
Fixed problem with adding new events to the database through the BE tab dialogs.

Fixed the editing of user data from the BE edit event data tabs.


Now can create Btrieve databases with long file names.
Corrected problem when an attempt is made to open a file that was not a database file,
in some cases the file was deleted.


Filters




The CSFree filter can now save cutset files with multiple modules.
The CSRaw filter was failing under some cases when a file contained more than one
module (e.g. reading RSAT output)
Corrected problem in FTRTF filter when creating temporary files.
The FTFTP and FTFTPL filters could fail on fault trees which contain XOR gates.
GTPROB32 (version 4.0a)


Added "/CLOSE" switch to automatically close the program on completion.
Set default memory usage to half of the physical memory of the computer.
CQUANT32 (version 4.0a)

Fixed problem with input files containing events marked as initiators. In certain
combinations the program would GPF.
Changes for CAFTA version 4.0a

Created demo version of 4.0
Changes for CAFTA version 4.0
General Changes

32-bit. All programs are now full 32-bit programs. This includes:
-
Support for long file names
-
32-bit common dialog, so when selecting files to open you can:
-
sort by name, date, size, etc.,
-
create new folders
-
delete files and change file attributes
-
improved memory management and smoother multitasking

Installation. The installation program now includes the ability to uninstall the software.
Also, you are not prompted where to install the shared files. These files will be installed in
"c:\program files\r&r\common files". This default location can only be changed by an
administrator.

ODBC Databases. The reliability database can now be stored in a Microsoft Access or
ODBC (e.g. Oracle) database format. Microsoft Access (97) is now the standard format. The old
Btrieve database can still be created and used. The sample files are now configured using an
Access database.

The GTPROB tool for calculating probabilities of all of the gates is now part of the standard
application package. It is no longer an optional add-on.

Templates. When creating a new fault tree, cutset file, or database, you can now select a
template for the new file. This allows you to save common settings (e.g. font size, colors, display
options, truncation probability, database fields) to be applied to every new file you create. The
templates can also include data. For example, the database template can contain generic
industry data that is to be used on each new project; or several fault tree templates can be
created representing standard subsystems that are used over an over again.

Tip of the day. When starting up, the applications now provide tips for how to get more
out of the software without reading the manual.

The recently-used file list has been increased from 4 to 8 items.

Toolbars are now dockable.

Recently used files information is now kept by user in the windows directory rather than in
the global cafta.ini.

The quantification tools now have a windows user interface instead of a scrolling command
line display.
Data Changes

The database now configured to support override type codes. That is, in addition to
automatically extracting a type code name from character positions in the basic event name, you
can explicitly assign any character string as a type code for a basic event.

The database now configured to support override rate values. That is, you can explicitly
assign a failure rate to a basic event without using a type code value from the type code data
table. This support now also includes support for uncertainty information for this failure rate.
(note: uncertainly coupling can not be correctly calculated when using override rates)

The database now supports equations. This allows you to define a probability for a basic
event by using an equation. The equation can use any record in the basic event or type code
database as inputs. (note: the optional UNCERT tool does not support equations).

The standard data dialog box has been totally reworked so that drop-down lists are
available to select calculation type, symbol types, units, distributions, etc. The prompts on the
dialog now automatically adjust based on the user's selections. The calculated probability is now
updated as you make selections and enter values.

The database now configured to support links. The link user interface has been reworked
to allow any number of links of any type.
Fault Tree Editor

Gate inputs and several other gate attributes (e.g. true/false state, pagination options) are
available when you double click on a gate event.

Maximum number of gates and basic events has been increased from 32,000 to
2,000,000,000 (effectively constrained by available memory)

True/false events are processed while you edit the tree. Previously, the true/false
propagation was only calculated when you set an event to true or false. Now if you change a
gate type or perform other edits of the tree, the true/false propagation will be recalculated.

The toolbar now includes buttons for adding new events to the left, right, or below the
current event.

When changing a basic event to a gate, you are now prompted for a gate type and a
number of inputs. Previously, CAFTA would always default to a two-input AND gate.

The toolbar now includes buttons for find, event properties, and calculate.

The initiator (arrow) symbol is now on the pop-up dialog when you click on a basic event
symbol.

There is a new Tools/Basic Event Data check that allows you to find all basic events that do
not yet have data defined.
Cutset Editor

The memory management has been improved. Although the limit on the number of
cutsets is 2,000,000,000, memory configuration limitations would decrease the effective limit to
about 100,000, no matter how much memory was available. The software has been successfully
tested with more than 800,000 cutsets using about 64Mb of memory.
Database Editor

The database editing now occurs on the actual database file. Previously, the database
editor would work on a copy of the file, which would prevent you from using the fault tree editor
and database editor at the same time on the same data. This change removes the "save" and
"save as" menu items, as changes now occur immediately in the database.

The toolbar now includes buttons for find, event properties, and filter.
Filters

The CAF3/CUT3 filters are now the default save format, where appropriate

The NUPRA database filter can now read both DOS and Windows versions of NUPRA files.

The free format filter can now read FTP files (including combination gates)

The RTF fault tree filter can now include page numbers in the output.

There is a new filter for the windows version of Risk Spectrum. This filter will also create
the event tree sequence logic and process boundary condition flags.
Changes for CAFTA version 3.2c

Personal version of 3.2b
Changes for CAFTA version 3.2b
Fault Tree Editor





Added support for right mouse clicks on gates and basic events.
Added linking.
The user can now add link data for gates and basic events. Link data stipulates another
file (perhaps using another application) where further information is contained about the
event.
Link data is saved in the reliability database; thus the same links can be used in both
fault tree and cutest files (requires that a LINK field exists in the database).
The Goto Link option under the tools menu allows the user to launch the file link to the
current event.










Automatically sets up a link with the master module file based on the current event name
Corrected Windows 95 failure on exit.
Corrected several problems in the find and replace command.
Input now inserts the new logic into the current cursor location
Corrected several problems in tabular display. Including find on the first gate and cursor
placement problems.
Added jump to gate option to the tabular display mode.
Can now enter the name of a master module cutest file for the fault tree (note that he
name will only be saved under 3X fault tree file format).
Database and master module filenames are saved relative to the fault tree file (only in 3X
fault tree file format). This allows the movement of the file without losing this
connection.
Several minor printing problems have been fixed.
Include filter for Risk Spectrum for DOS files.
Cutset Editor






Added sort by class. Corrected sort failure on very large cutest modules.
Added linking (see notes under fault tree editor).
Added support for right mouse clicks on events and cutsets.
Can now enter the name of a master module cutest file (note that only the name will
only be saved under 3X cutest file format).
Corrected several report problems.
Corrected save problem were the .CUT file extension was changed to .CU.
Reliability Database Editor




Corrected GPF on click in the white space.
The cursor is now correctly placed on when a database file is opened.
Expanded the maximum length of a database record from 256 to 1024.
Include filter for Risk Spectrum for DOS files.
General

Updated the support for network keys.
Changes for CAFTA Version 3.2
Fault Tree Editor
•
•
New horizontal fault tree display. This is available from the View,Display dialog.
•
New tabular fault tree display. This includes sorting plus most previously existing
menu items.
Improvements to the normal fault tree display.
- Zoom toolbar control has been added.
- More events now show on the screen.
- Gates are now automatically staggered on the display and printouts.
- Half-staggering occurs on vertical display when descriptions are not
showing.
- Redraw performance has been improved.
- Max display width can now be set at zero to use the default of the longest
actual event name, and you can set the value to less than the current
longest name. Also, max event width can be set from 1 to 31 instead of 8 to
31.
- Database errors will not fail the drawing.
•
Improved printouts.
- Layout has been changed to better conform with the DOS version,
including more room for page transfers, better use of page space, and
more consistent use of line widths.
- You can now display up to 4 database fields of information next to any gate
or basic event, including special indicators for rate and exposure.
- Highlighted gates in the display now print as highlighted.
- Circles now are true circles, all input connector lines are the same color.
•
Improved Editing.
- New drag and drop editing features. You can now move tree logic from
one place in the tree to another by holding the Ctrl key while dragging.
Adding the shift key will make a copy of the logic. This action can be
performed within one tree, or among different trees.
- New Insert Level menu command to move logic down the tree.
- Ctrl-Home key now defaults to the current top.
- New Find & Replace command has been added.
- The Find command will now find every output of a gate or basic event.
•
Improved Reports.
- All reports can now be sent to a file or to the clipboard.
- The format of reports sent to the printer has been improved.
- A bug with the depth-first report when the tree has many tops has
been corrected.
•
Improved Interfaces.
- You can now past a graphic image of a pgae into PowerPoint. After pasting
the image into Word, the page now scales and prints correctly without
addition user intervention
- The command line can now contain a gate with which to start the display.
This is in the form: FTED TREE.CAF[TOP]
•
New Initiator symbol has been added, accessed with an "I" in the Symbol field of the
database.
•
New RTF filter allows saving the graphic pages to a multiple page word processing
document.
•
The database file will now automatically open if it can be found.
•
Other Improvements.
- Add %proj% to the user menu parameters.
- New command line parameters to open a file at a particular gate.
- Evaluate options in the INI file assumes that the program is in the
application directory.
- Improved speed of Prune Modules and when multiple tops are present.
- The common dialog window now change the default extension correctly.
- Processing of 0.0 and missing probabilities in the file filters has been made
more consistent.
- Default multiple output gate color has been changed to make it more
readable when trues or falses are set.
- If trues or falses are set, filters will write out values as 1.0 or 0.0.
•
Problems corrected.
- Problems with merging very large fault trees (>10000) have been
corrected.
- Module Independence check now does not report the module itself.
- Corrected problem with INI settings that affect XOR gates.
- Corrected group pages problem when max event name length was less
than 10.
- Now avoids the "library not notified" message when double clicking a file in
the File Manager or when changing the name of a file via Save As.
- Summary info screen will no longer show negative sizes for very large
trees.
- Problems with the auto-description capability have been corrected.
- Fixed problem where group pages dialog would not show all pages when
using 31 character event names.
- Errors during read of free format fault tree are now correctly reported.
- Problems with the print button operating differently the first time have
been corrected.
Cutset Editor
•
Improved Cutset Report features.
- All reports can now be sent to a file or to the clipboard.
- Importance reports can now be sorted by name or any importance
measure
- New reports are available to provide class and initiator totals.
- The standard cutset report can be limited to active or a certain percentage
of the results.
- Cutset report include percent contribution.

New multiple-module operations.
- Cutset reports can include all modules in the file.
- Load Database Probs and Update Module Probs can now work on all
modules in the file.
•
Improved Editing.
Undo Function has been added to all editing action in the Edit and Tools
menus.
- Multiple cutsets can now be selected for Cut and Copy actions.
- New Find & Replace command has been added.
- Append and Paste now insert the new cutsets at the current cursor
position.

Greatly improved speed of Delete Term and Subsume functions.
•
Memory management has changed to increase the limit of approximately 800
modules in memory simultaneously.
Reliability Database Editor
•

The calculated basic event probabilities can now be exported to text files.

New calculation “Type 6” has been added.

You can now copy an entire database record to or from the clipboard.

The fist ("name") field of the database can be edited by double clicking the record.
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Reports can now be sent to a file or to the clipboard, with print preview capability.
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In addition to sorting cutsets by probability, you can now sort events within a cutset.
Other Improvements.
- Add event dialog now remembers the last value you entered.
- The current field value is now displayed on the status line.
- Module selection and status button have been combined onto the toolbar.
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Problems corrected:
- A blank line at the end of a free format file will no longer cause a GPF.
- The occasional startup error message of incorrect Btrieve version (caused
by errors in the WIN.INI file) has been removed.
General
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New configuration editor. User interface has been added to edit the CAFTA.INI file.
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File Filters now include version checking.
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The programs will now remember the last used window size and position.
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Problems corrected:
- The DLLs now use memory more efficiently.
- Problems launching FTED and CSED from other applications while the DLL
is in use have been corrected.
Changes for CAFTA Version 3.1a
Fault Tree Editor
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Corrected bug that caused occasional corruption of CAF2 format file.
Corrected several minor problems in reading very large files (e.g. >10000 gates).
Cutset Editor
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Corrected bug in importance report
General
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Corrected spurious "Can not find language DLL." error message when calling DLLs from
Visual Basic.
Free format cutsets no longer need probabilities in the first column
Added NUPRA fault tree, cutset and database filters.
Added combination gate support to reading and writing MAR-D fault trees, corrected for
IRRAS bug that produces cutset files with extra ^EOS, corrected several other minor
problems.
Changes for CAFTA Version 3.1
Fault Tree Editor
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Corrected problems preventing the Module Independence check from working.
Greatly improved the speed of Extract Subtree and Compress True/False.
Added multiple user definable quantification methods.
Added ability to edit the TC database from the fault tree.
Improved the display of gate parents and gate tops.
Added ability to display any database field in any position of the gate/basic event objects.
Changes Find key to Ctrl-F, and True/False keys to Ctrl-Shift-T/F.
Added undo command.
Added auto descriptions at the event popup dialog (with F4 key).
If a new basic event is created and the matching type code has a description, the
description is automatically copied to the basic event.
Corrected occasional problems when merging a fault tree into an empty file.
Corrected problems reading very large (>8000 gates) fault trees.
Removed extraneous error messages when opening CAFTA from the Windows File
Manager.
Cutset Editor
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Added Module Operations dialog, which now includes the ability to delete and rename
modules.
Class probability calculation has been added.
Cutsets now wrap if they can not be displayed on a single line.
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Added ability to edit cutset descriptions.
Top event probabilities now appear on the reports.
Improved speed of sorting.
Reliability Database Editor
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Added ability to concatenate two CAFTA database files (import).
Added report capability.
For multi-user situations, the database editor can now be run on the real database file
instead of on a temporary copy.
General
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Added help to all portions of the program.
Changed most of the error return values.
Improved the layout of the menus.
Corrected misspellings and other minor bugs.
New file filters added for free format and MAR-D format files.
File filters are automatically loaded from the application directory.