GAMS World Forum

Nothing. You should use code boxes for your model and output though. You model in unbounded. Just limit the objective variable (e.g. z.lo = -1e6;) and see what "run away" variables you get. Check your application why this should not happen, turn your insight into constraints/model logic. -...

The attached program succeeds without a problem. If I remove the $stop and let GAMS continue, I get compilation errors when compiling "startup(s*,i,t)", you probably means "startup(s,t,*,i)" at least that makes sense from the code you have later. Now after fixing all this, I get ...

Don't just paste your GAMS source as normal text. There are fine code boxes in the forum editor. Also this issue is related to data so upload your Excel and GDX file as well so one can reproduce the error.

-Michael

Yes. -Michael

Look for logic equations in the forum. It is a frequently asked questions.

-Michael

Please read the documentation of gdxxrw at https://www.gams.com/latest/docs/T_GDXXRW.html. All parameters are read with the index k and the value of the parameter in the neighboring cell. Your sheets don't mention the index (k) at all. You did not provide the elements of set k, but here I am assumin...

I see. Debugging models is hard. What you need to do is to take be "better" solution you get by just providing the .l (or leave this out because it has no effect) and look at this solution. Explain the solution to yourself and detect the flaws in this solution. Next look at the equation th...

I think you need to upload something that lets us reproduce the error. I can't do this from the code snippets you have pasted.

-Michael

Sure, if you provide the Excel files to see what's going on.

-Michael

I have no idea what you are asking. The attached GAMS model runs though nicely. I don't find any .fx, I only find some .l in your code. They have no effect (since a MIP solver usually ignores the starting point if not instructed otherwise). If I turn the .l into .fx I still get a good solution but w...