Xpress Update 9.3.8

Community Manager

11 months ago

Xpress Updates 9.3.8 is now available on the client area for Windows, Linux, and MacOS on x86-64, and Linux and MacOS on AArch64, from
https://clientarea.xpress.fico.com/download_patch.php#938

This is the latest updates for the Xpress 9.3 release branch, respectively, and require matching licenses. Please note that these archives must be extracted over a prior installation of FICO Xpress 9.3, respectively.

Release Notes for 9.3.8

Xpress Optimizer 42.01.13

Fixed an issue that could lead to a crash when solving a mixed-integer quadratically constrained problem after solving a quadratic problem.
Fixed a performance bottleneck in linearization of equality indicators during presolve.
Fixed an issue with disconnected component solves for MIPs that could result in delayed rows being violated.
Fixed an issue in the Lifted GUB cover cuts separator, which could result in a crash in some rare cases.
Fixed an issue in the Strong Chvatal-Gomory cuts separator, which in rare cases could result in the separation of non-valid cuttig planes on some numerically challenging models.

Xpress Interfaces 42.01.13 (Python, R, Matlab, .NET, Java)

Python
- Fixed a crash when calling extractLinear() on an empty expression.
- problem.getnamelist() now supports all object types.
- Fixed a crash when accessing Xpress NonLinear controls and attributes from callbacks.
- Fixed a crash when converting Python expressions to nonlinear formulas with more than 512 tokens.