Xpress patch release 8.2.10 and 8.2.4

Document created by zsoltcsizmadia@fico.com on Oct 17, 2017
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Xpress patch 8.2.10 and 8.3.4 are now available on Box for Windows 64, Linux 64 and Mac 64 from





Xpress-Optimizer 31.01.13 release notes:


* Fixed an issue with solving quadratic problems in concurrent.

* Fixed an issue in the barrier that could cause a crash.

* Fixed an issue around termination of MIQP solves.

* Fixed an issue that might trigger an error when comparing NumPy arrays of objects that are neither expressions nor numbers.

* Fixed an issue that could produce an incorrect expression and/or undefined behavior when creating nonlinear expressions in Python.


Xpress-Nonlinear 31.01.13 release notes:


* Fixed a bug in the procedure that finds and compresses equivalent expressions.

* Fixed a bug that may cause a crash in constrained nonlinear problems.

* Further improved the numerical behavior of quadratic problems.


These are the latest Xpress updates for the Xpress 8.2 and 8.3 release branches. Please note that it must be installed over a prior installation of FICO Xpress 8.2 and 8.3 respectively, and requires a valid Xpress 8.2 \ 8.3 license.

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