Question in gurobi

回答済み

Kewei Fan

2023年12月28日 12:16

• 
• 
• 

I am a beginner, my model has this problem, I visit IIS is like this, but I do not know what this represents, can you explain to me?

関連

• computeIIS

0

• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:32

  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.
• 

  Elisabeth Rodríguez Heck

  • Gurobi Staff

  2023年12月28日 12:32

  Hi Kewei,

  It looks like you are calling Model.optimize() after computing the IIS, is this correct? This results in Status code 3 (infeasible) because the IIS is by definition an infeasible set of constraints. The IIS feature is meant to be used to write the IIS into a file using 

  model.write('iismodel.ilp')

  after computing it, and then inspecting the ILP file manually to understand why your model is infeasible. 

  You may find the article How do I use 'compute IIS' to find a subset of constraints that are causing model infeasibility? helpful. 

  Best regards,

  Elisabeth

  0
• 

  Kewei Fan

  2023年12月29日 05:20

  • 
  • 
  • 

  Thank you very much for your answer

   

  0

投稿コメントは受け付けていません。