Cannot evaluate constraint(s) at starting point

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I am using MINLP with NEOS solver, my problem is non-convex and I get this

Cannot evaluate constraint(s) at starting point

what does this mean and how I can fix it?

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The meaning is rather obvious. The functions in your constraints cannot be evaluated at the starting point. If the starting point is zero and you have log(x-0.5) in the model you may get a message like this.

The fix is to provide better bounds and a better initial point. How to specify this depends on how you created the model and what modeling tools were used.