Infeasible results in intial iterations and feasible results in further iterations

Answered

Mary Babaee

October 14, 2021 18:31

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In a dynamic bi-level optimization model solved by Gurobi, what can be the reason, for getting infeasible results for first two or three iterations and then feasible results for next iterations?

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 02:46 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

  October 15, 2021 11:17

  Hi Mary,

  There can be many reasons for infeasibility. The probably best way would be to write out the models constructed in the first iterations via the write() method and analyze them. The Knowledge Base article How do I determine why my model is infeasible? holds all essential information for this analysis.

  Best regards,
  Jaromił

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