NLP Solver reports problem failed but solution.error_flag is not set.

[TimKrause2]

The output from psopt shows: NLP solver reports: *** The problem FAILED! - see screen output but solution.error_flag is not set. Is this a bug or is there a better way to determine if the NLP solver fails?

[TimKrause2]

I looked at the code for psopt and found that there is a way to determine if the NLP solver succeeded. Just inspect solution.nlp_return_code. For example, like this:

if(solution.error_flag || solution.nlp_return_code!=Solve_Succeeded)
        return false;