GAMS World Forum

Hi Alireza, You could install GAMS 29 beta which has been released earlier this week and should just work with Catalina: https://www.gams.com/29/ For older versions, please install the Mac version of GAMS and follow one of the workarounds described in the previous posts of this thread. I hope this h...

Hi, With a GDX data layer, you have lots of flexibility when it comes to loading the data into GAMS. Besides the filtered read you get with $load, you can for example turn on domain checking when items are loaded with $loadDC or merge data into an already defined symbol with $loadM, etc. For more de...

Hi, I ran the following and it works: $onecho > shockC.csv ,sp1,sp2 2019,51.59000962,221.2765056 2020,297.1442391,198.4488019 2021,30.89360312,106.7259835 $offecho SETS yr year /2019*2039/ scn scenario /sp1,sp2/ Table shockC(yr,scn) 'shock path' $ondelim $include shockC.csv $offdelim ; display shock...

Dear GAMS Users, In the meantime, we found a much simpler workaround for the issue with macOS Catalina (10.15). You can open the GAMS Terminal app and enter the following: cd /Applications/GAMS28.2/ && xattr -rd com.apple.quarantine sysdir/ Note that you might have to adjust the path (/Applications/...

Hi,

The solve trace option might be what you are looking for: https://www.gams.com/latest/docs/UG_Sol ... SOLVETRACE

I hope this helps!

Fred

One potential explanation could be that you suffer from non-deterministic behavior when cplex hits the time limit. When you use time limits, the solving process becomes non-deterministic close to the end of the time limit. Eventually, Cplex does "something smart" close to the end with reslim=360 whi...

Hi,

What about the log files and files required for reproduction?

Fred

Hi, Assuming that you solve the exact same problem on the exact same hardware with the exact same software and that there are no other computationally expensive jobs running simultaneously, increasing reslim should not lead to a worse solution. You don't say whether you minimze or maximize but from ...

Hi, MPS is a file format for linear problems: https://en.wikipedia.org/wiki/MPS_(format) If you look into the resulting mps file, you should see hints like * Cannot handle NLP [...] * Cannot handle nonlinear equations, nonlinear part ignored. * Cannot handle nonlinear equations, nonlinear part ignor...

Hi, you are absolutely right. I edited my post accordingly.

Fred