AMPLS-API changelog¶

Here [Breaking] means the change that may break valid user code, [Fix] - a bug fix.

0.2.1 - 20240731¶

[New] CPLEXCallback: addLazy and addCut now support an optional parameter local, specifying if the added constraint is locally valid (value = 1) or globally valid (value = 0 - default)
[Fix] Python: fixed an issue arising when inheriting from solver-specific callback classes

[New] Python: added parameter import_entities to the method amplpy.AMPL.import_solution to import entities added via AMPLS back to the amplpy model

[New] Python: added parameter keep_files to the method amplpy.AMPL.import_solution that if set to true, keeps the exported row, col and NL files

[[Fix]] Row and column files written to the temporary directory when exporting from AMPLAPI or amplpy are now removed

[Fix] Gurobi: getting solution vector and objective bounds in callbacks at MIPSOL and MIPNODE

[Breaking] ampls::CPLEXCallback is now using the generic callbacks. Note that multithreading is not disabled by default but implementation needs extra care.
[Breaking] Solver and solver driver related errors in Python are now thrown as ampls.AMPLSolverException
[Fix] Fixed python wrappers for AMPLModel.*etAMPLParameter and AMPLModel.getStatus
[New] Added AMPLModel::infinity() and AMPLModel::negInfinity() to use when creating new entities with no bounds
[Fix] A problem arising when replaying in AMPL new entities recorded with AMPLModel::record()
[Fix] Mapping of callback information in BaseCallback::getValue()

[New] Added parameter to AMPLModel::load() and AMPLAPIInterface::exportModel<T>() to specify options when loading the model. Necessary for options that involve the solver driver
[Breaking] Renamed BaseCallback::checkCanDo to canDo
Options handling:
- [Breaking] Renamed the function AMPLModel::getIntOptionValue to AMPLModel::getIntOption
- [New] Implemented AMPLModel::getDoubleOption and AMPLModel::getStringOption

Reference

ampls:: Python solver libraries