Decision Optimization

Decision Optimization

Delivers prescriptive analytics capabilities and decision intelligence to improve decision-making.


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  • 1.  cplex stops running to solve Mixed Integer Programming

    Posted 10/26/14 11:04 PM

    Originally posted by: jshong


    Hi. I tried to solve stochastic mixed integer programming using Cplex. 

    I implemented the code in matlab using Yalmip.

    It started to solve it by showing the upper and lower bounds.

    But it didn't produce any bounds for more than 40 hours. 

    I think it is stuck at some point.

    The model is solved perfectly at some parameter but Cplex doesn't produce anything at other parameter value. 

    Is there anyway I can handle this,e.g to check whether it is still running and why it looks stuck at some points?

    For comparison, I run my problem with a different solver Gurobi and it keeps running. 

    I wish to solve this problem using Cplex since it is installed in our school server. 

    Is there anyone have a similar problem and resolve it?

    Thanks. 

     


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  • 2.  Re: cplex stops running to solve Mixed Integer Programming

    Posted 10/28/14 02:20 AM

    Could you please show us the CPLEX log output up until the point it gets stuck? Maybe you can also export the problem to a SAV file (see here which parameters you have to set to do so) and post it here, then we could try to reproduce and figure out what is going wrong.

    What version of CPLEX do you use?


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