Xpress-Optimizer and Xpress-SLP patch 28.01.10 for Xpress 7.9 is now available

Document created by oliverbastert@fico.com Advocate on Nov 26, 2015
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The Xpress-Optimizer and Xpress-SLP patch 28.01.10 for Xpress 7.9 is now available for Linux and Windows from here.

 

 

Xpress-Optimizer release notes:

 

* Fixed an issue in the dual simplex method where using a non-default dual strategy could lead to cycling.

* Fixed an issue that could cause poor mixed integer Gomory cutting performance for very large problems.

* New control FORCEPARALLELDUAL. When set to one it forces the single thread dual simplex to execute the parallel dual simplex algorithm.

* New barrier control option on XPRS_CHOLESKYALG to allow for the use of asymmetric correctors for LPs.

 

Xpress-SLP release notes:

 

* Improved efficiency when working with an excessive number of small quadratic expressions.

 

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 Xpress 7.9 and requires a valid Xpress 7.9 license.

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