GurobiError: No variable names available to index

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Rohan Bhatia

• 2020年03月23日 21:54
• 編集済み

While trying to use model.read(path_to_mst_file) in gurobipy, I get the following error:

 

File "model.pxi", line 1537, in gurobipy.Model.read

GurobiError: No variable names available to index

 

How do I deal with this?

Thanks

2

• 正式なコメント

  

  Simranjit Kaur

  Gurobi Staff

  • 2024年12月06日 00:48

  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?.
• 

  Eli Towle

  Gurobi Staff

  • 2020年03月24日 20:12

  Hi Rohan,

  You could see this error if you are trying to read a solution file into a model with no variables. Did you add variables to the model (named to match the variables in the .mst file) prior to calling Model.read()?

  Thanks,

  Eli

  0
• 

  Rohan Bhatia

  • 2020年03月24日 20:21

  

  

  

  Hi Eli! Thanks for the comment. Actually, the model contains all the variables when I'm calling model.read. I'm calling it just before model.optimize().

  Could there be any other reasons for this error?

  Thanks,
  Rohan

  0
• 

  Eli Towle

  Gurobi Staff

  • 2020年03月24日 20:45

  Hi Rohan,

  Could you try calling Model.update() immediately before reading the .mst file? Thanks!

  Eli

  2
• 

  Rohan Bhatia

  • 2020年03月25日 15:56

  

  

  

  Hi Eli,

  It worked! Thanks!

  Rohan

  1

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