Accessing optimization iteration data

Answered

Uwe Langenmayr

June 08, 2020 17:25

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Dear community,

I am quite new to gurobi and until now I mainly used the solver without having more interest in the optimization process itself. Now, I want to get a deeper look into what is happening inside the solver.

Therefore, I was wondering, if it is possible to access the optimization iterations interim results, e.g. the current objective function value, the corresponding decision variables, gradients and others. In my case, I am working with a linear problem.

Thanks and stay healty

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 03:12 Edited

  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?.
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  Jaromił Najman

  • Gurobi Staff

  August 03, 2020 07:54 Edited

  Hi,

  You can access a lot of intermediate information via callbacks (see here for the list of callback codes).
  
  Best regards,
  Jaromił

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