Decision Optimization

Decision Optimization

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

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why no value returned for decision variables

  • 1.  why no value returned for decision variables

    Posted Fri March 02, 2012 04:12 PM

    Originally posted by: HuiD


    Hi, I'm new to IBM ILOG OPL, I tried some simple examples from papers I read. The IDE gives results quickly for some problems, but for some problem, there no value for decision variables, nothing in solutions box, the Engine log box shows "Infeasibility row at "idxx" ", some other case the Engine log shows "Presolve time = -0.00sec. "

    I don't know how to troubleshooting for this. There is no syntax error when I run the configuration.

    Thanks
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    #OPLusingCPLEXOptimizer