v1.29.0

GAMSPy 1.29.0 (2026-10-15)

New features

• #912: Added minimum, maximum and absolute formulations to gamspy.formulations for modeling minimum, maximum and absolute value constraints.

Bug fixes

• #912: Fix indicator failing when USE_PY_VAR_NAME is "yes" and adding symbols named after its internal Python variables otherwise.
• #921: Fix incorrect equation type bug on repeated GDX writes.
• #922: Fix writing and loading GDX files whose path contains a space, and resolve relative GDX paths against the current working directory of Python.
• #926: Fix wrong values being sent to GAMS when the records of a parameter are a column sliced from the records of a variable or equation.
• #928: Fix incorrect and invalid LaTeX output of latexRepr and toLatex.
• #929: Fix xor precedence.
• #932: Fixed the expiration date of time-limited licenses in gamspy show license, which was 30 days earlier than the date GAMS reports.

Improved documentation

• #918: Fix swapped wet and dry season inflow data in the ClearLake SDDP example and update the worked examples that the documentation derives from it.

Dependencies

• #927: Add Python 3.15 support and drop Python 3.10 support.

Miscellaneous internal changes

• #893: Add linopy to IJKLM benchmark.
• #930: Unify the declaration, redeclaration, serialization and records handling of Set, Parameter, Variable and Equation in their common base class.
• #931: Set threads to 1 by default in model library tests to avoid cpu oversubscription in pipelines.