GAMS World Forum

Ryan, The solution PATH is returning is a valid solution. With complementarity models, the type of inequality you use when defining the function (Equ6 in your case) does not play a role in defining the problem. It is essentially ignored. Consider the matched pair f() perp-to L <= x <= U. In your cas...

Hello,

You have declared parameter d(i,j) but you reference d(r,c). That won't work.

-Steve

Hermela,

I don't see the files 2simulation.log and 2simulation.lst in your attachments. If you send those, it is more likely you'll get good help.

-Steve

Hermela,

I don't see the file 2simulation.log in the .zip file. Ditto for 2simulation.lst. If you send those, it is more likely you'll get good help.

-Steve

Hello, The empty GDX file may go back to cases where csv2gdx encounters an error and returns an error code. For example, with an empty (zero-length) CSV file I get an empty GDX file if csv2gdx fails but a nice GDX file if csv2gdx runs cleanly. fractal:/home/sdirkse/models/csv$ csv2gdx emptyNoHeader....

Hermela,

I looked at the 1model.log file in the .zip you sent. It looks like a normal and successful run. Where are you seeing errors? Please be specific about where you see errors, and why you consider them to be so.

-Steve

Hello, If you use better names, the model explains itself. This can be very useful when starting to write models. For example, I would expect a model about diets to have a set for the possible foods to choose from. This set could better be named food[/code than i or j. Ditto for the set of nutrients...

Hello,

As a first cut, you could take the solve time from <modelname>.resusd, save it as a scalar in GAMS, write this scalar to GDX, and read the GDX to Matlab via GAMS Transfer Matlab (i.e. GTM).

HTH,

-Steve

Hello,

To pass solver-specific options (like the XPRESS cutstrategy parameter) to a solver, use a solver options file.

https://www.gams.com/latest/docs/UG_SolverUsage.html
https://www.gams.com/latest/docs/S_XPRE ... SS_OPTIONS

-Steve

I tried this on my Windows 11 machine, and I get gamstransfer installed on R 4.2.2 without a problem. I did this in RStudio: RStudio 2022.12.0+353 "Elsbeth Geranium" Release (7d165dcfc1b6d300eb247738db2c7076234f6ef0, 2022-12-03) for Windows Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWe...