Getting an error when trying to use Gurobi 11.0.1 from AMPL bundle in Ubuntu

indrajitsg commented 5 months ago

I downloaded the latest bundle from AMPL website containing Gurobi 11.0.1 along with all the other solvers. Created a "msc" file containing the following:

{
  "id": "com.gurobi",
  "name": "Gurobi11",
  "description": "Gurobi executable",
  "version": "11.0.1",
  "executable": "../../../../Downloads/ampl.linux-intel64/gurobi",
  "supportsFzn": false,
  "supportsNL": true
}

When I try to run: ./minizinc --solver Gurobi11 --gurobi-dll "../../../../Downloads/ampl.linux-intel64/libgurobi110.so" models/army.mzn

I just get an error: ====ERROR====

What am I doing wrong? It works fine with CPLEX in the bundle.

Regards,

indrajitsg commented 5 months ago

Okay looks like the issue is with Gurobi not being able to solve that particular problem. Could be an issue with the NL file that gets generated out here. I was able to execute Gurobi on another model.

Dekker1 commented 5 months ago

Sounds like this issue has already been resolved.

When using Gurobi or CPLEX, we would recommend the internal interfaces rather than the NL interface

MiniZinc / libminizinc

Getting an error when trying to use Gurobi 11.0.1 from AMPL bundle in Ubuntu #797