Issue with calling Knitro

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John zhang

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Jun 8, 2024, 10:06:51 AMJun 8
to Artelys Knitro forum
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.

WechatIMG228

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

WX20240606-122317@2x

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

Appreciate your answer !

Richard Waltz

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Jun 10, 2024, 12:16:42 AMJun 10
to kni...@googlegroups.com
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




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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