Xpress Update 8.14.5

Xpress Update 8.14.5 is now available for Windows and Linux on x86-64 and Linux on AArch64, it can be accessed here.

This is the latest update for the Xpress 8.14 release branch. Please note that the Windows, or Linux archives must be extracted over a prior installation of FICO Xpress 8.14. This update requires an Xpress 8.14 license.

Release Notes:

Xpress Optimizer 40.01.05

• Fixed a crash in an advanced MIP reduction in presolve when the matrix grew too large.
• Fixed a problem with IIS computation on models that contain quadratic  or general constraints.
• Fixed an issue that SLP tuner log files have not been exported.
• Fixed a numerical issue with indicator constraints in sub-MIPs.
• Fixed a problem where XPRSgetlicerrmsg would return an empty string if the license file did not contain a token authorizing the Optimizer

• Improved handling of 0/0 in automatic differentation.
• Fixed an issue in MISLP that could lead to subtrees with feasible solutions getting cut off.
• Fixed an issue that could lead to incorrect declarations of infeasibility in nonlinear bound tightening.

• Fixed a problem in the Python interface which could cause xpress.Sum to return incorrect results and could cause numpy.prod to crash when applied to Xpress expressions.