Free model after interrupt (ctrl-c)

Answered

jake roth

• August 17, 2023 14:45

I am using julia, so my question might be more appropriate for the Gurobi.jl folks, but I was hoping to check here first to see if something is possible.

 

I have an optimization `model` that is currently getting optimized with `GRBoptimize(model)`. Partway through, an exception occurs (in my case, I interrupt the optimizer with ctrl-c). Similar to this post and this post, I would like to free the Gurobi memory with `GRBfreemodel(model)`. I have a try-catch block that should free the model if any exception occurs:

try
  err=GRBoptimize(model);
catch
  GRBterminate(model);
  err=GRBfreemodel(model);
end

but the code runs, I receive an error message coded 10017: OPTIMIZATION_IN_PROGRESS.

 

My question is: is there any way to halt the optimization and free the model for an "in-progress" optimization model?

 

Thanks,

Jake

Related to

• Error
• Termination

0

• 

  Jaromił Najman

  Gurobi Staff

  • August 21, 2023 08:27

  Hi Jake,

  I am not a Julia expert but I think that the Knowledge Base article How do I terminate Gurobi with SIGKILL? might give you an idea of how to handle the \(\texttt{GRBterminate}\) call properly. The important thing to know is that the terminate call may take a while to process the information and terminate all threads. This is what you need to capture and wait for before freeing the model.

  I hope this helps.

  Best regards, 
  Jaromił

  1
• 

  jake roth

  • August 23, 2023 02:14

  

  

  

  Ahh, thank you for pointing out the waiting requirement!

  0

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