GAMS World Forum

What I suggested was a way to get your own license, free of charge, that allows you to solve the model yourself. The license type is called a community license (https://www.gams.com/latest/docs/UG_License.html#GAMS_Community_Licenses). I thought that you would probably prefer being able to solve you...

Your model fits in the community license limits (https://www.gams.com/latest/docs/UG_Lic ... y_Licenses)
You can contact sales@gams.com to request such a license.

I hope this helps!

Fred

Actually, the output was right. Your idea of what the output should be like was wrong. Hard to have this fixed by a debugging tool ;-) When facing a problem as the one described in your initial post, it is often a good idea to have a look at the equation listing and column listing to check whether t...

Hi Nikou,

Can you share an example, so other forum users can reproduce the observed behavior.
Would also be interesting to know which version you are using.

Best,
Fred

Hi Petros, Happy to read that you solved your problem. However, to avoid confusion, I would like to mention that that the mipstart option has little to do with your initial problem. You wrote that Cplex returns infeasible for your model. Instructing Cplex to use a starting point (which is what you d...

Hi Jonathan, To avoid confusion, let's call your first approach "BCH approach" and the second approach "loop approach". I get your idea but there is no such syntax that allows you to do something like =*sense_c(allcuts)*= with the loop approach. The sense_c and rhs_c stuff is designed for the BCH us...

Hi,

You set a lower bound of 0.15 for d(n1 .n5):
Hence, it cannot be zero.

I hope this helps!

Fred

You can find the info you need in the documentation: https://www.gams.com/latest/docs/UG_GamsCall.html#GAMSAOsavepoint https://www.gams.com/latest/docs/UG_GDX.html#UG_GDX_EXECUTION_EXECUTE_LOADPOINT Providing a start point to a MIP solver may require to set an extra solver option (see e.g. https://f...

Hi, it seems that you do not want to restart GAMS but a solver run. There is no way to do this. With savepoint you can conveniently store a solution in a gdx file. You could load that solution a a start point the next day but that does not mean that the solver just restarts from the state of second ...

Nikou,

Dropping fixed values for variables works as you describe it (reste lower/uooer bound).

For MIP solvers, to use a starting point, usually you have to set a corresponding solver option, see e.g. https://www.gams.com/latest/docs/S_CPLE ... EXmipstart

I hope this helps!

Fred