Xpress Mosel is the premier algebraic modeling and programming language. Its best-in-class functionality enables operations researchers, and modeling experts to rapidly develop and deploy optimization solutions that solve complex, real-world business problems. It provides an easy-to-learn, robust way to interact with solver engines, and tightly integrates with Xpress Insight to deploy models into powerful, business user-friendly applications.
The Xpress Mosel 6.8 release improves support of the moseltest tool and deprecates the package ‘advmod’ to improve the consistency of the general solver API. In detail, we added the features listed below:
The package ‘advmod’ is now deprecated and will be removed in a future release. Please see the section ‘Logical constructs’ of the MIP formulations whitepaper on how to rewrite logical expressions with indicator constraints.
For the Linux platforms the ‘hadoop’ module has been updated to Hadoop 3 and is no longer included in release builds. It remains available from the Mosel open-source repository.
A new version of the ‘moseltest’ tool adds parallel execution of tests, where the number of concurrent executions is set via the new parameter NBW, and parameters ASYNCOUT, LOGWKR, XSRVLOG have been added to configure the logging. The test sequence can be specified via the new tags 'after', 'sync'. Subsets of tests can now be selected by labels specified with the tag ‘labels’ within individual test files by using the parameters SKIPLABELS and ONLYLABELS. Furthermore, coverage reports can now also be generated in Cobertura format that is supported by Jenkins. For your convenience ‘moseltest’ is now included with the distributed Xpress binaries. Additionally, its documentation and source also remain available from the Mosel open-source repository.
A new annotation property 'noimplicit' is available.
The ‘mmxnlp’ module now fully supports access to Knitro parameters prefixed by ‘xktr_param’ or ‘xprs_knitro_param’.
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Visit the Xpress release notes to learn more.
Updated 2 years ago
Version 3.0FICO
Community Manager
Joined July 21, 2025
FICO® Xpress Optimization Blog
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