Xpress Update 8.13.6

Community Manager

4 years ago

Xpress Update 8.13.6 is now available for Window, Linux, MacOS and Solaris on x86-64 and Linux on AArch64, you can download the update by following this link.

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 Nonlinear 39.01.07

Fixed an issue where empty rows and columns were dropped and not correctly postsolved when presolve was off in case XSLP_PRESOLVELEVEL was full.
Fixed an issue where solutions were incorrectly deemed infeasible when XSLP_PRESOLVELEVEL was below full.
Fixed an issue where having 35 or more distinct user functions could lead to an error about piecewise-linear functions.
Fixed a potential crash in the Knitro message handling.
Fixed a potential crash in the .nl reader.
Fixed a potential crash in SLP heuristics.
Fixed a potential crash in the formula parser.

Xpress Solver Interfaces 39.01.07 (Python, R, Matlab, .NET, Java)

[Python] The xpress.getcols function now returns integer indices for cut rows instead of failing with an error.
[Python] A blank line is no longer printed whenever a problem is destroyed.
[Python] The xpress.free function now deallocates all problems before freeing Xpress.
[Python] The xpress.free function now correctly releases the license when the number of calls matches the number of calls to xpress.init.
[Python] Fix a deadlock when repairing infeasibilities