Gurobi ImportError: No module named site

Answered

Manvi Gupta

May 02, 2020 17:15

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I have installed Gurobi Optimizer version 9.0.2 and CMPL version: 1.12.0 on Linux. I am using Gurobi to solve a CMPL model. It works fine with the default solver (CBC), but Gurobi gives me the following error

Python version: 2.7.17

What is the reason for this error? And how do I fix this? 

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 03:14 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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  Gwyneth Butera

  • Gurobi Staff

  May 04, 2020 23:11

  Hi Manvi - 

  Did you install Gurobi using "conda install gurobi"? Or did you install the full install as described in https://www.gurobi.com/documentation/9.0/quickstart_linux/software_installation_guid.html?

  Also, can you check what the values for the system variables PYTHONHOME and PYTHONPATH are?

  Thanks!

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  Manvi Gupta

  May 06, 2020 12:47 Edited

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  Hi Gwyneth,

  Thanks for your reply.

  I have installed Gurobi as described in the installation guide. 

  PYTHONPATH and PYTHONHOME are unset.

  Regards.

   

   

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  Matthias Miltenberger

  • Gurobi Staff

  May 06, 2020 12:31

  Hi Manvi,

  Can you please check whether you can run gurobi_cl without errors or warnings?

  Cheers,
  Matthias

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  Manvi Gupta

  May 06, 2020 12:45 Edited

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  Hi Matthias,

  Yes, gurobi_cl works fine. 

  Thanks.

  Manvi

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