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Unable to retrieve attribute 'x'



1 comment

  • Riley Clement
    Gurobi Staff Gurobi Staff

    Hi Seungmin,

    Note that the output you provide shows that you have an infeasible model, meaning no solution exists.

    I can see in the traceback on the line ending in "line 278, in optql" that the optql function is trying to access the solution values (the "X" attribute) which of course do not exist if there is no solution.

    The following article in our knowledge base may be a good starting point to help you understand why the model is infeasible: "How do I resolve the error Model is infeasible or unbounded"?

    - Riley


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