"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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• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:48

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
• 

  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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