Xpress Update 8.4.5

Document created by zsoltcsizmadia@fico.com on Jan 24, 2018
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Xpress Update 8.4.5 is now available on Box.com for Windows, Linux and Mac, from




This is the latest update for the Xpress 8.4 release branch. Please note that it must be installed over a prior installation of FICO Xpress 8.4 and requires a valid Xpress 8.4 license.


Release Notes:


Xpress Optimizer 32.01.08:


* Fixed issue with user-defined tolerances in component presolving.

* Fixed an issue related to LP folding partitioning.

* Updated the Ampl Xpress driver to version '20171006'.


Xpress Nonlinear 32.01.08:


* XSLP_AUGMENTATION bit 10 'Intial values do not imply an SLP variable.' now works with XSLP_PRESOLVE = 2.