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All rows and columns removed but still get new incumbent

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  • Michel Soares
    Thought Leader

    Hello,

    This is a quote from the Start parameter page: "If the Gurobi MIP solver log indicates that your MIP start didn't produce a new incumbent solution, note that there can be multiple explanations. ...  Another, more common possibility is that one of the Gurobi heuristics found a solution that is as good as the solution produced by the MIP start, so the MIP start solution was cut off."

    I believe this is the explanation of what happened in your case.

    The way I see it, providing Gurobi with an initial solution has the main objective of finding a better solution faster. Your model seems to simple enough that this start solution ends up having no effect.

    -1

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