Xpress Update 8.4.1

Document created by Michael.Perr on Nov 16, 2017Last modified by Michael.Perr on Nov 17, 2017
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Xpress Update 8.4.1 is now available on Box.com for Windows, Linux and Mac, from

 

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

 

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:

 

Mosel 4.8.1:

 

  • Compiler Library
    • an issue has been resolved in the handling of conversions in string concatenations
  • xprmsrv
    • windows: server no longer reports unjustified timeouts when starting instances

 

mmssl 1.4.2:

 

  • Enhancements/updates:
    • new default value for https_ciphers: "TLSv1.2+HIGH:TLSv1+HIGH:@STRENGTH"

 

mmhttp 2.4.1:

 

  • Bugs fixed:
    • HTTP headers of responses are now case insensitive

 

mosjvm 1.0.3:

 

  • Parameter 'jvmclasspath' can be used to set Java classpath from the Mosel model

 

Xpress-Optimizer 32.01.04:

 

  • Fixed an issue where creating ~8500 cones would trigger a crash in the Python interface.
  • Fixed issues where simplex solvers may wrongly declare numerical hard problems infeasible.
  • Ensure that all constraints without variables can be added with the Python interface.
  • Fixed an issue for MIPs that could result in invalid MIR cuts being created.
  • Fixed a numerical issue with rounding heuristics for MIPs with SOS constraints that could result in a solve hanging.
  • Fixed a termination issue with a local search heuristic that could result in an "internal error" message.

 

Xpress-Nonlinear 32.01.04:

 

  • Improved barrier fallback strategy for numerically instable solves.
  • The drcoltol handler and callback are now initiated by XSLPconstruct if set up.

 

Xpress Workbench 2.1.2:

 

  • Fixed errors when running Mosel models: "died waiting for dll loading, errno 11" and ""Resource temporarily unavailable"

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