Xpress update 8.1.6 is now available on Box.com for Windows, Linux and Mac from
Xpress-Optimizer 30.01.10 release notes:
* Added support for Python 3.6.
* Fixed an issue with the simplex sifting algorithm for dualized problems.
* Fixed an issue with the tuner for maximization problems.
* Modified how heuristics are run before the initial LP relaxation solve of a MIP to avoid some expensive cases.
* New control HEURDIVEITERLIMIT to change the simplex iteration limit for the diving and rounding heuristics.
Xpress-Nonlinear 30.01.10 release notes:
* Further improved the numerical behaviour of quadratic problems.
* Fixed an issue in which XSLP_UNFINISHEDLIMIT was always used as value 1.
This is the latest Xpress update for the Xpress 8.1 release branch. Please note that it must be installed over a prior installation of FICO Xpress 8.1 and requires a valid Xpress 8.1 license.