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"Oplrun Process is not responding" error

  • 1.  "Oplrun Process is not responding" error

    Posted 03/20/14 10:39 AM

    Originally posted by: pradeepram80


    Hi,

    I'm working on a column generation problem using OPL scripts. I get the "Oplrun Process is not responding" error after I created multiple subproblem calls feeding into the master problem. 

    For a simple toy problem, OPL runs fine. When I increase the problem size, I get the error during the second iteration of subproblem at the generate() function call.

    To isolate this problem, I made the subproblem with a trivial objective (minimize 1) and trivial constraint (1==1). I see the issue then while generating the master problem.

    I've tried setting JVM arguments as per the article I found on ibm website : http://www-01.ibm.com/support/docview.wss?uid=swg21568610. Still not successful.

    I've tried running oplrun from console (Run>>External Tools>>oplRun). Get the following error:

    <<< setup
    Solve master.
    Parallel mode: deterministic, using up to 3 threads for concurrent optimization.
    Tried aggregator 1 time.
    LP Presolve eliminated 26187 rows and 48794 columns.
    All rows and columns eliminated.
     
    MASTER OBJECTIVE: 8652639165389.23
    Solve sub.
    Tried aggregator 1 time.
    LP Presolve eliminated 1 rows and 1 columns.
    All rows and columns eliminated.
    Presolve time =    0.00 sec.
     
    SUB OBJECTIVE: 0
    Solve sub.
    Tried aggregator 1 time.
    LP Presolve eliminated 1 rows and 1 columns.
    All rows and columns eliminated.
    Presolve time =    0.00 sec.
     
    SUB OBJECTIVE: 0
    Solve sub.
    Tried aggregator 1 time.
    LP Presolve eliminated 1 rows and 1 columns.
    All rows and columns eliminated.
    Presolve time =    0.00 sec.
     
    SUB OBJECTIVE: 0
    ### UNEXPECTED ERROR ...

    Would like some help trouble shooting this issue. Let me know what info I can send to give more information

     

    Thanks,

    Pradeep


    #DecisionOptimization
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