GAMS World Forum

Hi!
Since I am not very experienced in using GAMS, I can not understand what the problem is. I leave the code attached because maybe someone can help me. The data entered are validation data and not the real data. Thank you very much!

Hello everyone, I have implemented a mathematical model in GAMS whose code runs without errors. However, only the binary variables have the correct solution. All the rest are zero, which is not supposed to be. I think the problem is in the code and not in the mathematical formulation, but I can't fi...

Hello! I have a problem with this same error 125. The constraint I want to write is as follows: image.png So, in GAMS I typed: cstr35(b,m,i,j,n,t).. sum(j, v(b,m,i,j,t)) + sum(n, v1(b,m,i,n,t)) =e= sum(k, o(b,m,j,k,t)) + sum(k, o1(b,m,n,k,t)); I have two errors saying the "Set is under control ...

I understood it now. Thank you very much!

Hello! One of the parameters I want to include in a model I'm working on is associated with four distinct indices, whose sets I have already defined. These are: P products /p1*p32/ D donor locations /d1*d4/ T planning periods /t1*t7/ S scenarios /s1*s3/ The BS(P,D,T,S) parameter will take values gen...