OMMX Python SDK 2.7.x

Version 2.7.0 includes an MPS parsing correction that can change the mathematical model loaded from the same file, including its feasible set. Review affected models and previous solver results when upgrading.

The 2.7.0 solver adapter packages require OMMX 2.7.0 or later in the v2 line.

Bug Fixes

Preserve implicit binary bounds when loading MPS (#1203)

Instance.load_mps() and ommx.mps.load_file() now give columns inside INTORG/INTEND with no BOUNDS entry the implicit binary domain [0, 1], following the Gurobi/HiGHS MPS convention. Previously, these columns became general integers with an infinite upper bound. This affected 17 variables in neos-2626858-aoos, changing its binary-variable count from 209 to 192.

Explicit bound records remain effective, including LO/LI 0 for nonnegative integers with no upper limit. Previously generated Artifacts, including those loaded through ommx.dataset, require separate regeneration from the source MPS; updating the SDK does not repair stored instances.