Search found 16 matches
- 2 years ago
- Forum: Solvers
- Topic: How can I find the global optimal solution for the following MINLP problem.
- Replies: 1
- Views: 2988
How can I find the global optimal solution for the following MINLP problem.
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...
- 3 years ago
- Forum: Modeling
- Topic: Solvers to solve the DICOPT problem
- Replies: 6
- Views: 67301
Re: Solvers to solve the DICOPT problem
Dear Michael,
Now, I understand it. Thank you so much.
-Md. Asadujjaman
Now, I understand it. Thank you so much.
-Md. Asadujjaman
- 3 years ago
- Forum: Modeling
- Topic: Solvers to solve the DICOPT problem
- Replies: 6
- Views: 67301
Re: Solvers to solve the DICOPT problem
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...
- 4 years ago
- Forum: Modeling
- Topic: Solvers to solve the DICOPT problem
- Replies: 6
- Views: 67301
Re: Solvers to solve the DICOPT problem
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 ...
- 4 years ago
- Forum: Modeling
- Topic: Solvers to solve the DICOPT problem
- Replies: 6
- Views: 67301
Solvers to solve the DICOPT problem
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...
- 4 years ago
- Forum: Modeling
- Topic: DICOPT: Stopped on NLP worsening
- Replies: 4
- Views: 3549
Re: DICOPT: Stopped on NLP worsening
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, ...
- 4 years ago
- Forum: Modeling
- Topic: DICOPT: Stopped on NLP worsening
- Replies: 4
- Views: 3549
Re: DICOPT: Stopped on NLP worsening
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...
- 4 years ago
- Forum: Modeling
- Topic: DICOPT: Stopped on NLP worsening
- Replies: 4
- Views: 3549
DICOPT: Stopped on NLP worsening
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...
- 4 years ago
- Forum: Modeling
- Topic: Error: Endogenous operands for * not allowed in linear models
- Replies: 4
- Views: 10067
Re: Error: Endogenous operands for * not allowed in linear models
Dear Michael,
You are absolutely right. Now I understand it.
Thank you so much for helping me to solve the problem.
Regards
Asadujjaman
You are absolutely right. Now I understand it.
Thank you so much for helping me to solve the problem.
Regards
Asadujjaman
- 4 years ago
- Forum: Modeling
- Topic: Warehouse Problem with minimizing the net present value of the cost
- Replies: 2
- Views: 8005
Re: Warehouse Problem with minimizing the net present value of the cost
Hi Fred,
Thank you. The problem is solved now.
Regards
Asadujjaman
Thank you. The problem is solved now.
Regards
Asadujjaman