The COPASI team announces the immediate availability of the stable release COPASI 4.38 (Build 268).

A new release of COPASI has been made available. Please visit our free download page to retrieve this latest development release. Please note this version is released under the Artistic License 2.0, which is an OSI approved license. This license allows non-commercial and commercial use free of charge.

Release Date: November 30, 2022

Bug Fixes

• Graphical User Interface (CopasiUI)
  • Improved import von Combine Archives containing multiple SED-ML files and task.
  • Improved display of the Fischer Information Matrix (FIM) and it’s analysis supporting unscaled and scaled results in different tabs.
  • Fixed editing of function parameters under Mac OS Big-sur and Monterrey caused by switch to Qt 6.
  • Fixed editing of the weight in the experimental data for parameter fitting when using multiple experiments.
• Simulation Engine
  • Optimization and Parameter Fitting deal now properly with invalid start values for the optimization parameters.
• Standards
  • Support export to SBML of mathematical expression containing initial values.
  • When exporting to SBML all COPASI annotations are now prefixed.
  • Fixed SBML import of units using multipliers different from 1 to encode scaled units.
  • Improved Combine archive export by adding the master flag to SED-ML files.
  • Fixed Combine archive export of old COPASI files created with COPASI prior to COPASI 4.6 (Build 32).
  • Implemented SED-ML import of scan tasks using functional ranges.

More information can be found in the changelog.