Decision Optimization

Decision Optimization

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

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changing UPPER and LOWER BOUND of a well initialized array

  • 1.  changing UPPER and LOWER BOUND of a well initialized array

    Posted Wed July 16, 2008 08:09 PM

    Originally posted by: SystemAdmin


    [typhoon said:]

    hello reader!

    my problem:

    "Dual infeasible due to empty column 'X#0#0'."

    even after having initialized the array X (a decision variable) between 1 and 50  and 1 and 60 respectively (for its 2 dimensions), the X tries to play tricks on me!!!!

    how can i make X understand that it doesn´t exist from 0 but from 1 ???

    thanx for your comments!

    max
    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 2.  Re: changing UPPER and LOWER BOUND of a well initialized array

    Posted Wed July 16, 2008 08:12 PM

    Originally posted by: SystemAdmin


    [alain.chabrier said:]

    HI,

    in X#0#0 0 is not the real index value but the position.
    If you change the "bigMapThreshold" parameter, you will have the real index value indicated.

    Alain
    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 3.  Re: changing UPPER and LOWER BOUND of a well initialized array

    Posted Wed July 16, 2008 08:42 PM

    Originally posted by: SystemAdmin


    [typhoon said:]

    that means that i don´t have to change the range, but that the problem is hidden elsewhere?

    i searched for the place where to change the "bigMapThreshold" parameters...but i couldn´t even find the "Project Options" and therefore not the  "OPL Language/General"-options :(

    ...thanks to you, alain!

    max
    #DecisionOptimization
    #OPLusingCPLEXOptimizer


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