Xpress-Optimizer and Xpress-SLP patch 28.01.12 for Xpress 7.9 is now available on the FTP and Box for Windows 64 and 32, Linux 64 and 32 and the Mac from
Xpress-Optimizer release notes:
* Improved objective scaling in the barrier algorithm.
* Fixed an issue in the barrier presolve that could incorrectly declare problems as infeasible.
* Fixed an issue with symmetry MIP presolve that could result in an incorrect solution being returned.
Xpress-Nonlinear release notes:
* No changes since 28.01.10
This is the latest Xpress-Optimizer and Xpress-SLP patch for the Xpress 7.9 release branch. Please note that it must be installed over a prior installation of FICO Xpress 7.9 and requires a valid Xpress 7.9 license.