GAMS World Forum

Hi Alexanre, Not sure if I understand your question correctly, but maybe need something like this: dr(n,nd)$(dcal(n,nd) gt 150 and dcal(n,nd) le 200) = 200; etc. Beware of the "ge" (greater or equal than) and "le" (less or equal than). Depending on what you want you also might ne...

Hi,

You can use in your bat-file the complete path to gams, e.g.:
"C:\Program Files\GAMS\win64\25.1\gams" C:\GAMSfile.gms
And it will open GAMSfile.gms

I think you can also use "gams C:\GAMSfile.gms" when you make a windows environment variable of GAMS

GFA

Hi pelorn, I tried to reproduce your error but somehow in my example they are the same? set t /1*5/; parameter CEMUTOTPER(t); CEMUTOTPER(t) = 5; parameter Test; parameter Test2; Test = (power((sum(t, CEMUTOTPER(t))),2))**0.5; Test2 = sum(t, CEMUTOTPER(t)) display Test, Test2; ---- 10 PARAMETER Test ...

I think it is also possible to state the path GDXXRW should send the log-file to (for example log=c:\GAMSmodel\log.txt) You could also use a "$stop" after the GDXXRW statement, then you don't need to wait for all other GAMS code to be run. Note that the GAMS-code you turned off is deleting...

GDXXRW should write the data to the GDX-file "data_ts.gdx", is the data for i_windOn/i_windNo/i_windOf in there? If not, you can let GDXXRW write a log-file which might give clues why the data is not read in properly: par=i_windOn rng=windOn!a6:bd8767 rdim=1 cdim=2 log=i_windOn.txt See als...

Maybe you include some files with $include? Then the line numbering is different because you have to add the number of lines of the included files.
But just look in the listing file, there it will print the GAMS code including the $include files and the numbering will be correct.

Hi Sarah,

You don't need semicolons after "$"-statements.
Here GAMS gives the error: "ZIMSAM2 Bad dimension: 1;"
Drop the semicolon in "cdim=1;" and it should work fine.

Auke

Dear GAMS-users, I'm trying to solve a MIP-model using CPLEX, however somehow the model becomes very slow (see attachment). What I don't understand is why it keeps saying "GAP 0%" while not returning an optimal solution. Does anyone have a clue why the model could be slow? I set the follow...

Dear GAMS-users, I'm trying to formulate a linear problem with three decision variables, however somehow I am not getting it to work properly. For example we have a production problem with three decision variables: - Quality of production inputs (Quality 1,2,3, etc.) - binary variable - Production t...

Hi, I'm struggling with this problem which seems easy, but somehow I'm not getting it to work properly. Lets say we have a production process which converts inputs into outputs which are being transported to several regions. My model (see attachment for a toy example which gives the same results) ma...