Decision Optimization

Decision Optimization

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


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  • 1.  Solving IP Model

    Posted 06/19/09 01:21 PM

    Originally posted by: SystemAdmin


    [shadi said:]

    hi,
    I have an ip model that has the following I/O data:
    input: two tupleset (1. columns details, 2: trips inside columns)
    output :one boolean array same size as the first tupleset (1: to include the column in the final column and 0 atherwise).


    my problem is:
    why sometimes ip use  suddenly a lot of memory and i get out of memory error, although the size of the input is not so big....

    1. is there is a method (parameter) to stop the ip model exactly before use all the memory of the machine, even if it dosnt give the optimal solution?
        i dont want to run the project two times and in the second time to change the faillimit parameter, becuase it take a lot of time.
    2. how i can solve this kind of problem??? is this a bug in my project or it is a opl bug????


    i use the following parameters before solve the model:

      ipConfig.cplex.mipemphasis = 4;
      ipConfig.cplex.epgap =epgap;
      ipConfig.cplex.tilim = CplexTimeLimit;


    where (epgap,CplexTimeLimit are user input)

    thanks in advanced
    shadi
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