GAMS World Forum

If your GAMS program would compile/work you could use model2tex (https://www.gams.com/latest/docs/T_MODEL2TEX.html) to represent your model and its algebra in LaTeX. -Michael

Replace x**2 by sqr(x). You can use ipower (i.e. sqr for i=2) rather than rpower which has restrictions of the operands.

-Michael

GAMS API is not limited to Conda. But Conda might have resolved your system library issues. -Michael

Problem is infeasible and IIS large (from GAMS/BARON): Problem is infeasible Calculating an IIS Irreducibility of the (I)IS provided cannot be guaranteed (I)IS contains 125 rows and 52 columns So no easy answer. You find many good suggestions how to deal with infeasible models in the forum. Good luc...

Reading the 42 release notes helps: https://www.gams.com/latest/docs/RN_42. ... 210_PYTHON

-Michael

First, look at the forum rules. This has "send the self-contained, executable GAMS code that reproduces your problem to the group". This does not work with screen shots. Attach the text file with the GAMS program! Now to your question, if you have a undesired outcome, check the constraint ...

Nope. There is no execution time goto. The only controls you have to influence the flow of execution are break, continue (in loops), abort[.noError] to terminate, and if/elseif/else.

-Michael

Make sure the mentioned file is actually there. gmdcclib64.dll has some dependencies that should all be resolved by libraries that come with GAMS. Try running a simple model from GAMS with its own version of Python (don't set the GMSPYTHONLIB environment variables), e.g. "datalib embeddedSplit ...

If you use a global solver like BARON you get the certificate that the model is indeed infeasible. The forum has many topics that explain how to deal with infeasible models. IIS is one way. In your case the IIS found by BARON is pretty large: (I)IS contains 188 rows and 219 columns . So this is not ...

The error says "unknow symbol", so you probably have not declared z. Errors often have something to do with context. So it really helps to send the entire model file if you expect help as spelled out in the forum rules: app.php/rules

-Michael