Issue with calling Knitro

[John zhang]

Dear expert,

I use pyomo to formulate my problem and then use ampl to call knitro to solve my problem, as show in code below.
self.solver_pyo = pyo.SolverFactory(modules.find(“Knitro”), solve_io = “nl”)

And my program contains 3 processes to solve three different problem simultaneously, with two successfully returns local optimal solution, the third one reports error with message below:
ERROR: Solver (asl) returned non-zero return code (-11)
ERROR: See the solver log above for diagnostic information.

I have checked the document of Knitro, it didn’t explain return code (-11).

So I wonder if anyone could explain it why it didn’t work ?

Appreciate your answer !

[Richard Waltz]

Hi,

I am not familiar with these error messages.  The error messages you report do not come from Knitro itself.  Rather they likely come from the Ampl Solver Library (asl) or from Pyomo.  I would suggest contacting the AMPL or Pyomo teams to see if they have some information here.  Note that the Pyomo interface is not maintained by Artelys.

Regards,

-Richard

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From: kni...@googlegroups.com <kni...@googlegroups.com> on behalf of John zhang <z6249...@gmail.com>
Sent: Friday, June 7, 2024 9:10 PM
To: Artelys Knitro forum <kni...@googlegroups.com>
Subject: [Knitro] Issue with calling Knitro

 

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