GAMS World Forum

Unfortunately no. I tried changing the constraints from quadratics to absolute values to simplify them even though a less precise solution would result. Similar output.

Yes. I'm using the NEOS server at the University of Wisconsin. There are a number of solvers and I test them all. Several literally come back saying optimized. I know because others say "too many iterations", so I take the final values and use them as initial values in the next run.

Dear Sir or Madam, I have developed a mid-sized minimization model (176 variables, 4180 constraints). When I execute the model on different non-linear solvers I get results, which I plug it into an excel spreadsheet for analysis. My problem is that my more complicated constraints are not honored (i....