Calling GAMS from MATLAB

[Ish]

Hi,

I want to call GAMS from Matlab and I referred to the following video for my reference:

https://www.youtube.com/watch?v=HPn_q8nlktE

I was able to install GAMS software as suggested in the video, I added GAMS to the path in Matlab. However, when I type this in Mallab: system 'gams ? lo=3' or system 'gams trnsport lo=3' I get a message from Matlab:

'gams' is not recognized as an internal or external command, operable program or batch file.

ans = 1

Could someone kindly help me with this issue.

Thanks

[Anjuli Jain Figueroa]

Hi Ish,

  I had some trouble when I first started interfacing Matlab and GAMS. It has been a while, and although I don't remember if I had the exact same problem as you, these are a few things to check:

1- In addition to adding the path to Matlab, I had to add it to the computers "environment variables" (through control panel)

2- Both Matlab and Gams had to be the same 64-bit versions.

3- I used Matlab's system() function like this: rc = system ('gams ModelName.gms lo=2 solver=path");

4 - Here are a few additional sources that helped me:

ftp://ftp.cs.wisc.edu/math-prog/tech-reports/98-19.ps

http://support.gams-software.com/doku.php?id=matlab_and_gams:interfacing_optimization_and_visualization_software_via_the_gdxmrw_utilities#error_messageinvalid_mex-file_wgdxmexw64the_specified_module_could_not_be_found

Hope some of this can help!

Best,

Anjuli

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Anjuli Jain Figueroa, EIT

MS Technology and Policy
Massachusetts Institute of Technology

aja...@mit.edu

[Ish]

Hi Anjuli,

Thank you for the prompt reply. Issue was that I had to manually add GAMS path in the system variable path. I added it to the computer "environment variables" (through control panel). Thank you for your suggestion. It is working now. :)

Ish