Decision Optimization

Decision Optimization

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


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  • 1.  addMIPStarts via Concert (Java) in CPLEX 11.0

    Posted 06/10/10 08:48 PM

    Originally posted by: JonasAhmt


    I am currently working on a project where I am quite sure it would be very beneficial to take advantage of CPLEX's addMIPStart feature. I am accessing CPLEX through Concert using Java in Eclipse. My problem is that the functions I want to use (specifically addMIPStart and deleteMIPStarts) do not seem to exist for the IloCplex class. Curiously, writeMIPStart and readMIPStart DO seem to exist, indicating that some support for MIPStart is available. As far as I understand these two functions are used for writing out an already added MIPStart or loading in an already created MIPStart.

    I am using CPLEX 11.0 which I do believe should support these functions. Does anyone have any suggestions on how to get access to these functions? Or any suggestions for workarounds? It would be very much appreciated.
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  • 2.  Re: addMIPStarts via Concert (Java) in CPLEX 11.0

    Posted 06/11/10 10:59 AM

    Originally posted by: SystemAdmin


    CPLEX 12.1 does have IloCplex.addMIPStart in the Java API, but CPLEX 11.0 apparently does not. You can probably get the desired effect using IloCplex.setVectors (specifying primal values only -- in fact, just specifying the integer variables should do the trick).

    /Paul

    Mathematicians are like Frenchmen: whenever you say something to them, they translate it into their own language, and at once it is something entirely different. (Goethe)
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