Xpress update release 8.1.4

Document created by zsoltcsizmadia@fico.com on Jul 31, 2017
Version 1Show Document
  • View in full screen mode

Xpress update 8.1.4 is now available on Box.com for Windows, Linux and Mac from

 

              https://fico.box.com/v/xpress-8-1-4

 

Xpress-Optimizer 30.01.08 release notes:

 

* Fixed an issue with re-presolving of MIPs where only indicator constraints remain in the problem.

* Fixed an issue with re-presolving of MIPs containing both indicator constraints and quadratic constraints.

* Fixed an issue that could result in a wrong best bound being reported for a MIP solve finishing due to a root re-presolve.

* Fixed an issue with MIPs that could result in memory corruption.

* Fixed an issue with symmetry detection for MIPs.

* Fixed an issue in presolving which could lead to infeasible solutions declared to be feasible.

* Fixed an issue where the Optimizer could crash in case indicators are present.

* Fixed an issue with the loading of a basis file in compact format when super-basic variables are already present in the problem.

* Fixed an uninitialized name issue in the Python interface.

* Fixed the creation of constraints in Python by means of their components (body, rhs, sense).

* Fixed the addition of non-continuous columns on a pre-existing problem in Python.

* Fixed the printing of a problem's attributes and controls in the Python interface.

* Fixed an issue with the use of NumPy 32bit integers and floats in the Python interface.

* Fixed an issue with the product of expressions in the Python interface.

* Fixed an issue in error reporting with the Python interface.

* Fixed an issue in the representation of quadratic expressions in the Python interface.

* Fixed an issue with a missing method in the Python interface.

 

Xpress-Nonlinear 30.01.08 release notes:

 

* Fixed an incorrect bound reduction in expressions with arctan() operators.

* Fixed an issue that might prevent SLP from handling formulae within bound tightening.

* Fixed an issue with XSLPsetcurrentiv in which it would return an error code even when succeeded.

* Fixed a problem in which an infeasible converged solution was declared optimal.

 

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.

Attachments

    Outcomes