column name in bound section not defined

Awaiting user input

ce jekl

March 30, 2022 01:52

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What's the meaning of this warning?

What action can trigger this warning?

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:40

  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 try Gurobot, our chatbot interface offering instant, expert-level support.
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  Maliheh Aramon

  • Gurobi Staff

  March 30, 2022 02:41

  Hi, 

  The warning means that there are variables in the BOUNDS section of an MPS file that are not defined. That is, those variables do not appear in the COLUMNS section and are not part of the model. 

  Best regards,

  Maliheh

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  ce jekl

  March 30, 2022 13:22

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  Thank you, but "what kind of action can result in this waning"?

  The mps I read comes from gurobi_model.write("test.mps"). I don't have a clue why this situation happens.

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  Maliheh Aramon

  • Gurobi Staff

  March 31, 2022 02:32

  Yes the warnings are strange if the model is written as an MPS file by Gurobi. Could you please post a minimal, reproducible example? Which Gurobi version are you using? 

  Alternatively, you can share your code that builds the model, if possible, using Dropbox, GoogleDrive, or OneDrive such that we can reproduce the warnings you see.

  Best regards,

  Maliheh

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