Solver (asl) did not exit normally

[David Landry]

Hi guys,

I'm having trouble running a non-linear model through solver Couenne. In one of my models I get this error when I insert non-linear constraints

ERROR: "[base]/site-packages/pyomo/opt/base/solvers.py", 568, solve

Solver (asl) returned non-zero return code (-11)

ERROR: "[base]/site-packages/pyomo/opt/base/solvers.py", 571, solve

See the solver log above for diagnostic information.

Traceback (most recent call last):

  File "./optimize_pose_main.py", line 51, in <module>

    results = solve_instance(instance)

  File "./optimize_pose_main.py", line 36, in solve_instance

    results = solver.solve(instance, tee=True)

  File "/home/david/.local/lib/python2.7/site-packages/pyomo/opt/base/solvers.py", line 575, in solve

    "Solver (%s) did not exit normally" % self.name)

pyutilib.common._exceptions.ApplicationError: Solver (asl) did not exit normally

The thing is, one of my other models runs just fine with the same kind of constraint. I don't know why one of the models works and the other doesn't. I run the models through the BOOTSRAP.py script.

I think it might be a bug with couenne underneath. Do you guys know how I could save the model the is sent to the solver, so that I could debug couenne directly?

Thanks! I'll gladly provide any precision you need.

David Landry

[Gabriel Hackebeil]

If you add “keepfiles=True” when you call the solve method it will print the name of the temporary NL file that is written and prevent it from being deleted. You should be able to use that to manually debug things with Couenne.

Gabe

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<WORKS.py><DONTWORK.py><BOOTSTRAP.py>