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Solving non-convex MINLP and Warning: small or zero constant in general constraint NL "GC0" will be ignored

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  • Jaromił Najman
    Gurobi Staff Gurobi Staff

    When I was solving a non-convex nonlinear (continuous) problem, it reports "Solving non-convex MINLP".

    This is the default output then solving non-convex nonlinear problems. Gurobi does not introduce additional discrete variables.

    Besides, I also get multiple lines of consecutive warnings before starting to solve the problem as below, what does that mean?

    This means that in your nonlinear constraint, you have very small constants, i.e., constants with \(|c|< 10^{-13}\).

    If there is anything else, then you could share your model such that we can have a closer look. Note that uploading files in the Community Forum is not possible but we discuss an alternative in Posting to the Community Forum.

    Best regards, 
    Jaromił

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