7
$\begingroup$

I'm trying to use Neos/GAMS to solve an optimization problem. I will need to get a MPS file from the model. With using GAMS IDE it is easy to use an option file to get it but, it needs a licence file for large models.

My question is, is there any way to get an MPS file using the Neos/GAMS web interface?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
6
$\begingroup$

To create a MPS file using GAMS, you have two options as follows:

  1. Your first option is to use the CONVERT solver. AFAIK, this solver is not available on NEOS Server (see here for a list of available solvers).
  2. Your second option is to use the solver-specific options to create MPS files. For example, CPLEX has a writemps option, which allows you to generate a MPS file in CPLEX format. Again, NEOS Server does not allow any output file other than solution GDX and log files. Hence, I don't think you can use this option either.

I think you have to option to overcome this situation as follows:

  1. First, you might find some open-source solver that supports generating MPS files as its output. Perhaps, COIN-OR can do this, but I'm not familiar with it. Others might provide more information.
  2. The second option is to write a computer code to write MPS files for your specific problem. There are various sources on the web that describe the MPS file structure. One example is available from here.
Improve this answer
$\endgroup$
1
  • $\begingroup$ thanks so much for the detailed explanation $\endgroup$
    – A.Omidi
    Sep 7, 2019 at 7:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.