GAMS World Forum

Dear Dr. Dirkse, I have 2 cases: Tw<=(M-N) and Tw>=(M-N). If Tw<(M-N), the result would be the minimum of m1, m2, and m3 (m4, m5, m6, m7, and m8 are definitely infeasible). If Tw>(M-N), the result would be the minimum of m4, m5, m6, m7, and m8 (m1, m2, and m3 are definitely infeasible). If Tw=(M-N),...

Dear Dr. Bussieck, The model works well, but I have one problem. In equation 1/Te*log((W*Te/D)+1) =L= M-N the models considers the left hand side up to 2 digits and it causes some numerical examples get the wrong answer. I have attached the Excel File, including four numerical examples. In the secon...

Thank you very much for your complete response.
We actually celebrate Nowrouz, which is the first day of Spring.
Anyway, Happy Christmas!
I wish you the bests.

I have defined all the functions in sequence. But, I have two problems: 1. Although I have defined all of the variables, GAMS gives me Error 66 (The symbol shown has not been defined or assigned). 2. Moreover, I want to ask GAMS to read data from an Excel file and display the results in another one....

Thank you very much for your great help.

Model- GAMS.pdf Thank you very much for your great support. I have a question. My model consists of different models, depending on the parameters and the variable's relationships. How can I define it in GAMS? I mean how it is possible to ask GAMS that if the first set of constraints is satisfied, t...

Thank you very much indeed. I have one more problem. One of the errors is division by 0 and I must set the variable T greater than (not equal to) zero. I could not find any operator to do so. I would highly appreciate it if you guide me how to define T>0 in GAMS, in which T is a decision variable. B...

Yes, you are right.
Thank you very much for your help.
I will check the model and try to solve the other errors.

Dear friends, I have a problem modeled in GAMS and I encounter some errors (the first is Identifier Expected) and I do not know how to solve them input.xlsx . I would highly appreciate it if someone can help me solve this issue. The files have been attached. Best regards. NP1 - New.gms NP1 - New.gms...