Model start value setting and computeIIS

Answered

BOHAO WANG

May 06, 2024 14:29

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I have some problem when I try to set the start value of the Variables. I get the start value by adding more constraint to the previous problem. And I want to use the results as the initial solution of the previous problem. But it seems that the initial solution is infeasible because the logging showing no change and still cannot find a solution form a long time.
Therefore I try to add the initial solution as constraints to check it. I do get 'Model is infeasible or unbounded'. But when I use the 'ComputeIIS(), it shows 'GurobiError: Cannot compute IIS on a feasible model'. Besides I use 'DualReductions' and show the model is infeasible.

Thank you for your help.

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 13, 2026 01:25

  This post is more than two 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 try Gurobot, our chatbot interface offering instant, expert-level support.
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  Simranjit Kaur

  • Gurobi Staff

  May 07, 2024 00:52

  Please take a look at this article: How do I diagnose the error "Cannot compute IIS on a feasible model"?.

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