xpress version and options
It seems there a not so many Xpress users around; I think most ETSAP partners are using the GAMS/Cplex solver.

I have no experience with Xpress either, but wonder whether the Xpress solver you are using is the one that comes with GAMS, or a standalone Xpress solver with a separate license and linked to GAMS?  If the former, note that you can well keep many GAMS installations on your computer, and any newer GAMS licenses do keep working with older versions as well.  Therfeore, unless you have a separate license to a standalone Xpress, I would suggest to keep the old GAMS installation with the well-working older Xpress version, in order to have a backup plan if running with the new version fails.

But otherwise, I would suggest to contact the Xpress support, or community forum, and describe your problem.

Messages In This Thread
xpress version and options - by edward.thomas - 13-05-2022, 08:20 PM
RE: xpress version and options - by Antti-L - 20-05-2022, 04:53 PM

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