"callbacks disabled for solver gurobi"

Answered

Noortje Bonenkamp

• April 01, 2020 13:17

Hello community,

Currently I am investigating an MILP in Pyomo with gurobi. I would like to be able to add cuts during the B&B and found that callback functions can be used for this purpose. However, when I try to implement a callback function I get the following error: "callbacks disabled for solver gurobi". This error does not seem very common, and I wonder if you have any clue where it comes from.

I hope to hear from you.

Best regards,

Noortje

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• 

  Noortje Bonenkamp

  • April 06, 2020 13:43

  

  

  

  This question is answered, as apparently  callbacks are not possible in Pyomo. 

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• 

  Gwyneth Butera

  Gurobi Staff

  • April 06, 2020 14:54

  Hi Noortje - 

  I am not an expert Pyomo user, but I do see an example of a Gurobi callback in the Pyomo documentation here:

  https://pyomo.readthedocs.io/en/stable/library_reference/solvers/gurobi_persistent.html#pyomo.solvers.plugins.solvers.gurobi_persistent.GurobiPersistent.set_callback

  And in StackOverflow here:

  https://stackoverflow.com/questions/58200552/pyomo-and-gurobi-does-pyomo-support-solver-callbacks-to-gurobi/61028887#61028887

  I hope this helps!

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  Noortje Bonenkamp

  • April 08, 2020 14:37

  

  

  

  Thank you!!

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