GAMS World Forum

Hi all, I have a set kk in my model. I am trying to write a loop for kk and do some calculations for each elements of kk. For example, first kk=3 and I have equations for kk={1,2,3}. Then I need to have kk=4 and have the same equations for kk={1,2,3,4}. I need to increase kk=20 and run the model for...

Hello GAMS community, I have a large MIP model that I run using CPLEX on a supercomputer with 768GB memory. The model stops running after a couple of hours without returning any solution. Model status and solver status are both 13. All the CPLEX options including OptCR are at the default values. My ...

Hello all, I have a MIP model that is slow. I have been trying to speed up the model for more than a month but I have not had much success so far. I am well aware that understanding the model can be difficult for someone who has not written the model, but can someone take a look at the attached mode...

Thank you very much.

Hello all, I have a simple quadratic model that requires NLP solvers to solve (this is a simple version of my actual model). However, I have linearized this model to solve it with MIP solvers. The linearized model works well and gives the exact same solution as the quadratic model. My problem is tha...