Dear message_ix community,
Hello. I have tried to connect GAMS with MESSAGE model.
However, when I installed the GAMS, I could not see the option below.
“Add GAMS directory to PATH environment variable” on the Advanced Options page.
My GAMS is very old, version ’23.5’.
Would it be possible to connect this old version with Message ix ?
Or if you recommend me to buy a new one,
could you please let me know which version is the best?
(The latest version I checked is the 28.2)
I appreciate if you could provide me technical assistance.
Best regards,
Miho
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Dear Matt,
Thank you for your help.
I will try it again.
Best,
Miho
Dear Miho and Matt,
If you want to run MESSAGEix with MACRO linkage there is actually a GAMS version dependency. The “break” statement used in MESSAGE-MACRO_run.gms to exit the iteration loop between MESSAGE and MACRO which was added to GAMS version 24.8.1 (https://www.gams.com/latest/docs/RN_248.html#RN_2481). It seems the documentation of this dependency has been accidentally removed in the restructuring of the installation guidelines (at least I cannot find it) and should be re-added more clearly again.
Best, Volker.
Thanks Matt,
When I installed old version GAMS, I could not see the tick box. (But new version has.)
This is why I wondered old version might not be able to be connected.
But I will try to do the option of System Preference->Environment Variables-> edit.
Thank you again,
Dear Volker,
Thank you so much for your assistance.
So, that means I need to install the version at least after 24.8.1?
The latest version 28.2 also may work?
Best,
Miho
Yes. Just GAMS versions before 24.8.1 fail, because they don’t know the “break” statement used in the code.
Best, Volker.
To view this discussion on the web visit https://groups.google.com/d/msgid/message_ix/000201d57f44%24ad4c4c60%2407e4e520%24%40iges.or.jp.
Thank you so much Volker and Matt for your supports.
Now I figure out!
Best,
Miho
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