Xpress Update 8.13.8

Community Manager

3 years ago

Xpress Update 8.13.8 is now available for Window, Linux, MacOS and Solaris on x86-64 and Linux on AArch64, click here to access.

This is the latest update for the Xpress 8.13 release branch. Please note that the Windows, Linux or Solaris archives must be extracted over a prior installation of FICO Xpress 8.13. This update requires an Xpress 8.13 license.

Release Notes:

Xpress Optimizer 39.01.09

Fixed an issue occurring on indicators during a represolve
Fixed a performance issue with writing text files (LP, MPS, ...) on Windows. Writing a file with many lines should now be significantly faster.
Fixed a crash resulting from all the quadratic variables being linearized, leading to an unexpected condition.
Fixed a potential source of non-determinism during initial outer approximation cuts for MIQCPs.
Fixed a potential crash when presolving MIQPs.
Fixed a potential crash when adding general constraints with many constant elements to a problem.
Fixed a crash in an advanced MIP reduction in presolve when the matrix grew too large.

Xpress Nonlinear 39.01.09

Fixed an issue where a wrong column could be reported as the reason for unboundedness.
Round exponents as explained by the error message when encountering rational powers of negative numbers.
Fixed an issue with the usage of flags in XSLPreminim/XSLPremaxim.
Fixed an incorrect logging message for initial points given to Knitro.
Improved handling of 0/0 in automatic differentation.