New features and improvements
- Documentation and example update - many updates on structure documentation.
- EULA adjustment.
- Add latest version 5.3.0 of CM2 libraries.
- Add Python lib of pyopenxl.
- Add icon gray-out/highlight to the workspace content selector pull-down to indicate whether a document is already in the workspace view. Also provide a modified indicator for data files.
- Adjust layout width of property list.
- Add Maxwell dynamic damping option for non-rigid structure links.
- FLAC2D A lot of structure improvements.
- FLAC2D Enable Python support for Attach logic in 2D.
- FLAC2D/3D Update Lode angle interpolation function and algorithm of NorSand model.
- FLAC2D/3D Add add-control-point keyword to sketch edge create by-points command which is needed to transfer FLAC geometry to Sketch commands.
- FLAC2D/3D Sketch: Increase thickness of background geometry lines and fixed long-standing issue with wrong scaling of selection rectangle for background geometry.
- FLAC2D/3D Sketch: improvements: improved restview on ExtrusionScene; update the size of anchor points for background item on ExtrusionScene.
- FLAC2D/3D Sketch: command that creates the segments from background geometry now works with rotation/translation/scale.
- FLAC2D/3D Sketch: the rubberband selection now works similarly to Rhino. If selection rectangle drawn from left to right, items within rectangle is selected; if drawn from right to left, items cross the rectangle is also selected.
- FLAC2D/3D Sketch: segments are clean before generating from background geometry.
- FLAC2D/3D Sketch: better projection for background geometry set in Extrusion Scene.
- FLAC2D/3D Sketch: support degenerated blocks when creating zones by rotating.
- FLAC2D/3D Sketch: create functionality to "centralize" background geometry in the Extrusion view so the left corner of it (typically lower-left) matches the first node of the extrusion path.
- FLAC2D/3D Sketch: enable functionality to draw extrusion path by snapping extrusion nodes to background geometry.
- FLAC2D/3D Sketch: introduced new capability to lock first extrusion node (this is default option).
- 3DEC Improve zoning logic (block zone generate-new) by adding a new option to specify the number of control points on block faces.
- 3DEC Faster the zoning logic.
- 3DEC Fix block to-flac3d to hybrid bolt creation in FLAC3D.
- 3DEC Some plotitems are multithreaded.
- 3DEC New command block join-by-contact.
- MASSFLOW Add FISH functions for extracted markers.
- MASSFLOW Add color and map to drawbell to drawpoint plot item.

Bug Fixes
- Fix project restore bug.
- Fix highlight in project pane was incorrect.
- Fix for using the modified icon in the content selector.
- program echo off turns off the information and progress but not warnings or log files.
- FLAC2D/3D Sketch: fix the gridpoint order in ExtrusionGenBlock may be not correct.
- FLAC2D/3D Fix bug that user defined models not automatically loaded.
- FLAC2D/3D Sketch: fix issue with inconsistent translation/centralizing of the extrusion path (using sketch path translate center) when switching from Construction to Extrusion view. Now extrusion path is automatically "centralized" only when it contains unmodified default edge; any changes to the path disable automatic "centralization".
- 3DEC Fix to flow plane generation when using block zone gen new.
- PFC Add the ability to match multiple keywords.
- PFC In the Mohr model all one to set a flag so that if a tensile failure then the pore pressure is set to 0.
- PFC Fix issue if oddMeshConnect.
- PFC Fix Rblock export to zones.
- MASSFLOW Fix bug in secondary fragmentation when file is restored.

New features and improvements
- Documentation update.
- Get back missing datafile in Linux version.
- Update EULA.
- Reverse the tolerance before 154 for calculating of principal stresses and directions.
- Keep modified files in memory while viewing other files, so the user can open the file again in the work space and undo/redo changes from previous views.
- Repairs to restore some FISH tables and fix width of one command map.
- FLAC2D Enable zonepython, zonepythonobject and zonepythonarray modules.
- MASSFLOW Add command massflow marker size-distribution.
- PFC Add range to the contact creation command.

Bug Fixes
- Cleanup the command model creep solve.
- Fix bug that convection apply cannot be changeable with FISH.
- Fix inadvertently broken remembrance of data files in projects.
- Manage having the same file name with different extensions when restoring projects.
- FLAC2D/3D Add zone id for illegal geometry error info.
- FLAC3D Fix bug that zone property cannot be assigned through python function set_prop_scalar when there are null zones.
- 3DEC Fix bug in generating flow planes when using block zone gen-new.
- PFC Fix bug when importing from "FLAC3D.
- PFC Fix new-side-group and make wall.contact.list get vertex contacts too.
- PFC Fix body work accumulation for clumps and rblocks.

Major improvements
- FLAC3D, FLAC2D and MASSFLOW v900 are officially in Pre-Release (Public Beta).
- Implemented Phase 2 of updated and improved Graphical User Interface.
- Updated Python to version 3.10.5.
- New enhanced Search & Replace dialog.
- Updated Visual Studio 2022 template for creating User-defined models.
- New capability to import pore pressure from csv files containing unstructured points.

New features and improvements
- Changed the default size of heading and copyright displayed on plots, made font size adjustable by user.
- Run button is now available for each .dat file; Stop button is moved to the top menu bar.
- Plots can now use improved Log scale with additional grid lines displaying.
- Improved scientific notation for plots legend and axes.
- Changed plastic state names for NorSand model.
- Enabled excluding past plastic states from plotting.
- Remember the cursor position and selection when reopening a data file within the same project session.
- Updated algorithms for calculation of tensor's principal direction, now follow right-hand rule.
- Modified read-only properties for IMASS and Hoek-Brown models.
- FLAC2D/3D Added Density in the material properties dialog available in the Model pane.
- FLAC2D/3D Sketch: Substituted 3-point circle option with new Quad-Split circle. Removed old option to create Quad-Split circles from blocks.
- FLAC2D/3D Sketch: Extrusion path is automatically centralized based on the extent of the Sketch geometry.
- FLAC2D/3D Sketch: Intersecting segments in the extrusion view are automatically highlighted.
- FLAC2D/3D Sketch: Added capability to deselect items with rectangular area using CTRL+ALT+selection.
- FLAC2D/3D Sketch: updated commands and FISH documentation.
- FLAC2D Enabled NMD for axisymmetric mode.
- FLAC2D Added geometric shape quality metric option to zone geometry-test command and zone.condition FISH function.
- FLAC2D Improvements in face selection in Model pane.
- FLAC2D Enabled additional Python bindings/functions.
- FLAC2D Corrected a set of input parameters for constitutive models derived from Weak-Plane type model.
- FLAC2D Verified and updated P2PSand model.
- FLAC2D Commands and FISH documentation is completed for Zone, SEL (Cable, Beam, Pile).
- FLAC2D Created new documentation section "FLAC2D Quick Start Tutorial".
- FLAC2D Created new documentation section "FLAC2D for FLAC8.1 users".
- FLAC2D Updated documentation for several Verification Examples and Example Applications
- Updated documentation/examples for Ramberg-Osgood hysteretic constitutive model and IMASS.

Bug Fixes
- Fixed an issue with tiles becoming inactive when restoring model.
- Fix list command for Ramberg-Osgood model.
- Fixed some broken documentation paths when pressing F1.
- Fixes to the License Generator.
- FLAC2D/3D Fixed broken struct ... import from-sketch command.
- FLAC2D/3D Fixed deleting geometry set when deleting corresponding background geometry in Sketch.
- FLAC2D/3D Increased accuracy in Jacobi implicit solver to get accurate solution for some extreme cases.
- FLAC2D/3D Fixed link creation on structural nodes when zones are created or un-nulled.
- FLAC2D/3D Sketch: fixed mouse snapping issues to an existing edge with the presence of the background grid.
- FLAC2D/3D Sketch: fixed some back-compatibility issues.
- FLAC3D Sketch: Fixed issue with creating zones from "flipped" extrusion segments.
- FLAC2D Fixed Zoom-to-selection in Model pane.

Major improvements
- FLAC3D v900 is officially in Beta.
- Added AWS cloud computer and cluster creation wizard, available under the Tools menu.
- Major user interface update. Central workspace is now divisible by the user.
- Updated the license not found dialog, added a security diagnostics output option for better support.

New features and improvements
- Added support for non-constant non-linear structural element properties.
- The User Interface can now detect if GPU support was enabled in Remote Desktop connections and stop forcing ANGLE mode and stop removing all plots.
- History/Table plots using log axes now have improved display.
- FLAC2D/3D Added ability to include accelerations in results files.
- FLAC2D/3D The 'zone validate' command now has the option to detect unconnected regions.
- FLAC2D/3D The demonstration size limit was raised to 1000.
- FLAC2D/3D Sketch: Added background grid
- FLAC2D/3D Sketch: Added command to specify deleting mode for extrude paths.
- FLAC2D/3D Sketch: Added command to create segment between two points.
- FLAC2D/3D Sketch: Added ruler.
- FLAC2D/3D Sketch: The keywords 'zone-length' and 'length' now work with segments.
- FLAC2D/3D Sketch: Edge length is not displayed on information dialog and object properties.
- FLAC2D/3D Sketch: Improved performance of zoom when curved segments are present.
- FLAC2D/3D Sketch: Added ability to select objects by group.
- FLAC2D/3D Sketch: Improved ability to import 3D DXF into 2D Sketch.
- FLAC2D/3D Sketch: Can select multiple edges and assign the same ratio to them.
- FLAC2D/3D Sketch: Added ability to merge nodes.
- FLAC2D/3D Sketch: New tool added to clean up edges and points outside meshed regions.
- FLAC2D/3D Sketch: Added grid snapping to extrusion scene.
- FLAC2D/3D Sketch: Added ability to assign ratios independent of edge directions.
- FLAC2D/3D Sketch: Added polyline tool.
- FLAC2D/3D Sketch: Added option to reverse (flip) ratio direction.
- FLAC2D/3D Sketch: Added option for extrusion path to UI.
- FLAC2D/3D Sketch: Added extrusion option to keep ends parallel to construction pane.
- FLAC2D/3D Sketch: Added point and clean mesh tool buttons.
- FLAC2D/3D Sketch: Popup editor to add/modify nodes/segment on extrusion view.
- FLAC2D/3D Sketch: Warning message is shown when zones are not able to be created by rotation.
- FLAC2D/3D Sketch: Added 'sketch path translate' command.
- 3DEC Changed minimim size for flow zones to equal the block tolerance.

Bug Fixes
- Fixed error in clock synchronization tests in the web license logic, causing false failures.
- Fixed errors in the struct.prop.index FISH function.
- Fixed error importing DXF files, that caused a crash in the Linux version.
- Fixed bug in fracture connectivity command.
- Fixed bug in set fracture FISH intrinsics.
- The constitutive model template and wizard should work again for v900 and Visual Studio 2022.
- The geometry plot item is more likely to automatically update when geometry data changes.
- The geometry plot item was not saving/restoring the polygon cut line width.
- The Norsand model was updated for better numerical stability.
- Fixed crash if the history/trace update interface is set to zero.
- Fixed an intermittent history read error that could occur if a history plot was visible during a model save.
- The 'program log-file' command was not working with the 'truncate' keyword.
- Increase maximum moduli for some stress-dependent constitutive models.
- PFC Fixed periodic space bugs for rblock-rblock contacts, and for spring network contact model.
- FLAC2D/3D Fixed bug assigning anisotropic fluid properties.
- FLAC2D/3D Fixed 'zone.mech.prop.name' FISH intrinsic.
- FLAC2D/3D Change all 'stres-strength' labels to 'strength-stress' for clarity.
- FLAC2D/3D Fix crash in model pane using bool type properties.
- FLAC2D/3D Improved performance of attach conditions in MPI.
- FLAC2D Many fixes to axisymmetric calculations.
- FLAC2D Many fixes to 2D structural elements.
- FLAC2D Fies to 2D interface logic.
- 3DEC Fix to contact area calculations for mismatched rigid blocks.
- 3DEC Fix bug in joint fluid flow when using 'block zone gen-new'

Major improvements:
- FLAC2D/3D, PFC, 3DEC, and MassFlow all now use the same unified installer.

New features and improvements
- Sped up performance of the GEOMETRY-DISTANCE range element significantly.
- Fix to the web license system to make it more tolerance of intermittent network connections.
- The web license clock synchronization test should not fail incorrectly any more.
- The various user defined model templates should now work for v900 and Visual Studio 2022.
- Fix bug assignming anisotropic fluid properties.
- FLAC2D/3D Sketch: Lots of features/support for out of plane extrude paths.
- FLAC2D/3D Zone plotitem generation speed improvements.
- FLAC3D Removed ZGROUP plot item, integrated capability into the main zone plotitem. More than 10x faster to generate.
- FLAC3D Added grid import from MIDAS.
- FLAC2D More 2D structural element support.

Bug Fixes
- Fix bug displaying group name in caption on plot.
- Fix bug rendering polygons intersecting a cutting plane.
- Fix history read error that could occasionally happen during a save if a history plot was visible in the UI.
- FLAC3D Fix for save file compatibility with v700 and apply face conditions.
- FLAC2D fixes and adjustments to axisymmetric calculations.
- 3DEC Fixed threading bug in calculations - should be faster.

Revision 151

Major improvements:
- Implementing Phase 1 (out of 5) of an updated Graphical User Interface.
- FLAC2D Initial implementation of axisymmetric analysis - mechanical calculations only (no interfaces). To configure for axisymmetry use command MODEL CONFIG AXISYMMETRY.
- FLAC2D Enabled SEL dynamic logic and added some examples.
- FLAC2D Enabled 'Scale Box' plotitem.
- FLAC2D Enabled 'Boundary' plotitem.
- MassFlow Added MassFlow section to the documentation

New features and improvements
- FLAC2D/3D Display current shape creation tool in the Sketch toolbar.
- FLAC2D/3D Added an option to omit past states when plotting yield states.
- FLAC2D/3D Added "rotation" parameter to the orthotropic elastic model.
- FLAC2D/3D Anisotropic fluid model now can accept hydraulic-conductivity properties.
- FLAC2D Enabled/fixed UI range elements for 2D.
- FLAC2D Enabled Dynamic Input Wizard in the Tools menu.
- FLAC2D Enabled SEL link FISH functions.
- FLAC2D SEL NODE LIST command: added information about translational and rotational acceleration.
- MassFlow Added MASSFLOW RECORD command.
- MassFlow Added FISH and plot items for mine blocks.
- PFC Improved performance of wall-zone logic when attaches are present.

Bug Fixes
- Fixed issue with generating movie frames.
- Fixed CTRL+2 keys combination to focus in the console.
- Fixed issue with throwing an exception if unable to create/write 'projectmaster.dat' when loading a project.
- Fixed issues when exporting user-defined data plotting to a datafile by group.
- Fixed issues with some error dialogs staying on top of all system windows.
- Fixed bugs in command FRACTURE INTERSECTION COMPUTE WITH-GEOMETRY.
- FLAC2D/3D Fixed an exception when merging points in Sketch.
- FLAC2D/3D Fixed geogrid plot with coupling stress.
- FLAC2D Fixed issue with internal designation of FLAC2D licenses which prevented using Technical Support dialog.
- PFC Fixed weights calculation for wall-facet contacts.

Major improvements:
- Implementing Phase 1 (out of 5) of an updated Graphical User Interface.
- FLAC2D Initial implementation of axisymmetric analysis - mechanical calculations only (no interfaces). To configure for axisymmetry use command MODEL CONFIG AXISYMMETRY.
- FLAC2D Enabled SEL dynamic logic and added some examples.
- FLAC2D Enabled 'Scale Box' plotitem.
- FLAC2D Enabled 'Boundary' plotitem.
- MassFlow Added MassFlow section to the documentation

New features and improvements
- FLAC2D/3D Display current shape creation tool in the Sketch toolbar.
- FLAC2D/3D Added an option to omit past states when plotting yield states.
- FLAC2D/3D Added "rotation" parameter to the orthotropic elastic model.
- FLAC2D/3D Anisotropic fluid model now can accept hydraulic-conductivity properties.
- FLAC2D Enabled/fixed UI range elements for 2D.
- FLAC2D Enabled Dynamic Input Wizard in the Tools menu.
- FLAC2D Enabled SEL link FISH functions.
- FLAC2D SEL NODE LIST command: added information about translational and rotational acceleration.
- MassFlow Added MASSFLOW RECORD command.
- MassFlow Added FISH and plot items for mine blocks.
- PFC Improved performance of wall-zone logic when attaches are present.

Bug Fixes
- Fixed issue with generating movie frames.
- Fixed CTRL+2 keys combination to focus in the console.
- Fixed issue with throwing an exception if unable to create/write 'projectmaster.dat' when loading a project.
- Fixed issues when exporting user-defined data plotting to a datafile by group.
- Fixed issues with some error dialogs staying on top of all system windows.
- Fixed bugs in command FRACTURE INTERSECTION COMPUTE WITH-GEOMETRY.
- FLAC2D/3D Fixed an exception when merging points in Sketch.
- FLAC2D/3D Fixed geogrid plot with coupling stress.
- FLAC2D Fixed issue with internal designation of FLAC2D licenses which prevented using Technical Support dialog.
- PFC Fixed weights calculation for wall-facet contacts.

Major improvements:
- Structural element logic added plastic beams, ready for use.

New features and improvements
- Update to the Norsand model.
- FLAC2D Enabled fluid particle tracking.
- FLAC2D/3D Add option of turning off Maxwell damping for structures.
- 3DEC Added commands BLOCK THERMAL ACTIVE ON/OFF and BLOCK FLUID ACTIVE ON/OFF.

Bug Fixes
- Several fixes to the second/shared license system. The second license available on the same computer that the first is claimed on should work more reliably now.
- FLAC2D Fixes to shear strain plotting, listing, and FISH.
- FLAC2D Fixes to the 2D interface logic.