GAMS World Forum

Dear Steve I'm very grateful for your help. You not only answered my question but also showed a better way to pursue my analysis. Wish you the best Iman Hello, As I understand it, you have 3 follower agents, each of whom solves their own optimization model, and one leader agent, also with an optimiz...

Hello friends Recently I read a paper written by Xuan Liu and Antonio J. Conejo. In this paper, they have 3 minimization problems. to find the equilibria, they converted these 3 optimization problems to their KKT equivalent and then added one auxiliary optimization. altogether, there would be one op...

Dear Atharv Thank you very much for your comprehensive guide. Thanks to your help not only about 'Keep option', but I learned how to deal with all of the command-line options. Best regards Iman Please note that keep is a command line option and not an option you invoke from a GAMS script such as opt...

Hello guys
Hope you are all just fine.
I want to prevent GMAS from deleting the temporary directory.
It seems there is a "keep" option. but I am not successful in applying it.
please help me to understand what is the correct syntax.
Thanks a lot.

Hello everyone, Hope you are doing great. In a model based on EMP model I came across a strange situation in which the variable is within the acceptable range but the corresponding equation has the "INFES" mark in the "SolEQU" section in the output. G1.JPG The equation requires &...

Dear Steve, Thank you very much for the reply. Also, I'd like to thank you for your answer to someone else's post about the error msg in EMP: "key expected ....... but instance not in variable rim". Your reply worked for me as well. I truly appreciate your generous efforts, You're a SAVIO...

Hello everyone I have pursued the matter and recently I came across a paper written by Youngdae Kim & Michael C. Ferris, and it's very illuminating actually. If you too are struggling with using EMP package in GAMS, I recommend having a look at it. The paper is accessible at the following addres...

Hello guys Hope you all are fine and healthy. This is probably a novice question and I hope you don't mind. What is the difference between a 'parameter' and a 'compile-time variable' ? I have seen codes starting with compile-time variables, such as: $set P 130 I don't get what facility it may bring ...

Dear Steve First of all I'd like to apologize for the delay in replying you. Unfortunately I got infected with Covid-19 and it was sever. Thank you for your response. Yes you're right. Equilibrium and ECS can be transformed to each other. Actually I tried ECS first but I wasn't much successful in it...

Again hi I found out that the problem was related to the declaration of the dual variable of the power-balance constraint. since the constraint is an equality, the dual variable should be a free variable. I made thecorrectoin in the code. Now I am faced with another problem. The model still doesn't ...