GAMS World Forum

I doubt that there is a silver bullet in the form of a solver option. It is known that MIPs can be very hard to solve or it can be very hard to prove optimality of a solution. That said, there is a chance that you won't be able to close the gap. If you need further assistance, I suggest that you sha...

Hi, Your syntax is correct. It does not matter whether you set the threads parameter through an option statement in GAMS, as a command line parameter or through NUM_THREADS in a lindo option file (read abooy sover option files here ). You can see that multiple threads have been used in the lindo log...

Hi, mipemphasis is a GAMS/Cplex option. You need to put it into a Cplex option file. You can read more about how to use solver options here . You can for example create the Cplex option file on the fly from your code: [...] myModel /all/; myModel.optfile = 1; option solver=cplex; $onecho > cplex.opt...

Hi,

Would it be possible to share your code and data such that we can try to reproduce the issue?

Best,
Fred

Hi,

This message is explicitly discussed in the GAMS Conopt solver manual including a suggested solution (adjust the workFactor).

I hope this helps!

Fred

Hi,

You can use the command line parameter output to do that.

I hope this helps!

Fred

Hi,

You might want to have another look at point 2 of the forum rules.

Fred

Hi,

With GAMS 34 the Python API was not installed via pip. Please make sure to use the documenttation that matches your GAMS version. The documentation of GAMS 34 can be found here.

I hope this helps!

Fred

Hi, The error you get is *** The following EMP errors were detected in model project: 781 Symbol m in dimension one not of type variable or equation in scenario dictionary Your symbol m is a parameter. In your dict set Set dict / scen .scenario.'' d .randvar .s_d m .level .s_m '' .opt .s_rep /; you ...

The EMP Library has many examples of bilevel models.

I hope this helps!

Fred