I have large a planning problem in AIMMS, which is linear optimization. I am using GUROBI 9.0 for solving it and the solver is set to use the Barrier method based on our experience that Barrier converges faster than Simplex in our large-scale problem.
After around 56 hours, the program stopped and I got the “Warning: Model status 13: Error no solution, solver status 1: Normal Completion”.
Here are screenshots from the warning and progress panels of AIMMS.
None of the existing questions and discussions on “Warning: Model status 13” are related to the case that it says “Solver status 1: Normal Completion”. I could not find any more information on software or the AIMMS manual regarding this issue. I need to find what is the source of this problem. I would be grateful if you can help me with this issue.
Best answer by Marcel Hunting
You could print the Gurobi log file by setting the following options:
- Solvers General option 'Solver window messages' to 'All';
- Gurobi option 'Output file' to 'Yes'.
The Gurobi log file will be printed in the log folder. It often contains useful information.
It could be that the model has scaling issues. If you can share the project then I can take a look. You can also send an email to our support, with a reference to this topic, if your project contains sensitive information.