The COPASI team announces the immediate availability of the stable release COPASI 4.39 (Build 272).

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: January 31, 2023

New Features

• Graphical User Interface (CopasiUI)
  • Implement the creation of expressions for sum, sum of squares, sum of absolute, and product for a selected class of objects in expression widgets.
• Simulation Engine
  • Added irreversible uni-molecular and bimolecular Arrhenius kinetic functions to build in functions.

Bug Fixes

• Graphical User Interface (CopasiUI)
  • Fix possible crash when clicking the revert button in the parameter estimation task.
  • Improved plotting of parameter estimation results for steady-state experiments.
• Simulation Engine
  • Fixed possible crash when running optimization or parameter fitting using the optimization method Praxis.

More information can be found in the changelog.