GAMS World Forum

Hi, I have attached at MINLP problem. I am using license version of LINDO and LINDO GLOBAL to solve the problem. However, I got the local solutions every time. It also shows the following message "*** could not allocate enough memory". For better understanding I have also attached a screen...

Dear Michael,

Now, I understand it. Thank you so much.

-Md. Asadujjaman

Hi Michael, As my first example problem was small enough to solve with a global solver, thus now I am trying to solve a larger size problem with the global solvers. I have attached my problem below. I have tried to solve the problem using the LindoGlobal. It shows that, both the solution and the bes...

Hi Michael, Thank you. I got the solution. I see that the best integer solution found before the DICOPT stopped on NLP worsening is the global optimal solution. But, why the solver doesn't say that it finds the "global optimal solution found"? As the solver found the best integer solution ...

Hi, I am using the free time-limited evaluation license of CONOPT 4, CPLEX 12.10, DICOPT, MINOS and SNOPT solvers to solve a MINLP problems. Moreover, I am using the GAMS Release: 30.3.0 64 bit/MS Windows. However, in solving the MINLP problem, the DICOPT stopped on NLP worsening. I have tried all t...

Dear Steve, Now, I am using the free time-limited evaluation license of CONOPT 4, CPLEX 12.10, DICOPT, MINOS and SNOPT solvers to solve my problems before purchasing the academic GAMS licence software. Moreover, I am using the GAMS Release: 30.3.0, MS Windows. However, in solving the MINLP problem, ...

Hi Steve, Thanks for providing me the link of the DICOPT docs. I am planning to purchase the academic GAMS licence software. I am trying to solve both MINLP and MIQCP types of problem. So, which solvers are at least required to solve the MINLP and MIQCP types of problem? I am planning to purchase th...

Hi, I am solving a MINLP problem. The program runs. But after some iteration it shows the following message: DICOPT: Stopped on NLP worsening The search was stopped because the objective function of the NLP subproblems started to deteriorate. How can I solve the problem? I am using GAMS demo Version...

Dear Michael,

You are absolutely right. Now I understand it.
Thank you so much for helping me to solve the problem.

Regards
Asadujjaman

Hi Fred,

Thank you. The problem is solved now.

Regards
Asadujjaman