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cplexmiqcp no feasible solution with feasible start point

  • 1.  cplexmiqcp no feasible solution with feasible start point

    Posted Mon January 07, 2013 10:07 AM

    Originally posted by: SystemAdmin


    Dear all,

    I am using cplexmiqcp in Matlab.
    I first compute a feasible solution of the MIP (which I check and verifies all the constraints).
    I then call cplexmiqcp giving this point as initial guess (x0) in the call.
    If I set 'MaxTime'=0.1 it may return "-5 time limit exceeded, no integer solution" even if x0 is feasible (it checked something like 30 solutions but not the initial guess).

    It seems the initial point is ignored. Is there a way to start the solver from the initial (and feasible) point and refine it with time?

    Thank you for you time.
    Best,

    Javier
    #CPLEXOptimizers
    #DecisionOptimization


  • 2.  Re: cplexmiqcp no feasible solution with feasible start point

    Posted Mon January 07, 2013 10:18 AM

    Originally posted by: SystemAdmin


    Is it an option to use the class API instead?
    There used to be a bug in the toolbox functions that effectively ignored starting solutions :-(
    #CPLEXOptimizers
    #DecisionOptimization


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