Decision Optimization

Decision Optimization

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


#Analytics
#DecisionOptimization
#DecisionOptimization
 View Only
Back to discussions
Expand all | Collapse all

out of memory during generating constraints and objective function

  • 1.  out of memory during generating constraints and objective function

    Posted 04/03/11 11:07 PM

    Originally posted by: Ulysses.Sheng


    Hey, all,

    I am solving a MIP problem which I don't think is too large, but CPLEX gave me "concert exception caught: not enough memory" before my objective function was generated. All the constraints were generated though.

    I am wondering how many constraints Cplex can handle and is there any way to circumvent this problem except for re-formulating my mathematical model?

    ``````````````````````````````````````````````````````````````````````````
    part of the cplex output:
    Constraint 22******************************

    Constraint 23******************************

    Constraint 24******************************

    Constraint 25******************************

    Constraint 26******************************

    Concert exception caught: not enough memory

    ```````````````````````````````````````````````````````````````````````````

    thanks!!
    #CPLEXOptimizers
    #DecisionOptimization


  • 2.  Re: out of memory during generating constraints and objective function

    Posted 04/26/11 11:35 AM

    Originally posted by: SystemAdmin


    There is no hard limit on the number of constraints. The limiting factor is the number of non-zero coefficients in the constraints.
    How do you build up your constraints? Are these complicated expressions or are these very simple expressions?
    #CPLEXOptimizers
    #DecisionOptimization


Related Content