Error when importing gurobipy in a supercomputer

Answered

Carlos Olivos

August 29, 2022 21:17

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Hello, 

I am trying to use gurobi in a supercomputer and when I import the gurobipy library I got this error. I could not find something similar. 

See the error below

Traceback (most recent call last):
  File "tsp.py", line 1, in <module>
    import gurobipy as gp
  File "/opt/asn/apps/gurobi_9.5.1/gurobi951/linux64/lib/python3.8_utf32/gurobipy/__init__.py", line 1, in <module>
    from .gurobipy import *
ImportError: /opt/asn/apps/gurobi_9.5.1/gurobi951/linux64/lib/python3.8_utf32/gurobipy/gurobipy.so: undefined symbol: _Py_tracemalloc_config

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:29

  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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  Gwyneth Butera

  • Gurobi Staff

  August 30, 2022 13:11

  Hi Carlos - 

  As far as I know, we've only seen this error once before. This error might be due to a Python version mismatch, or to a de-installation of pytracemalloc.

  • Do you get this error if you run a Python example from the Gurobi example directory?
  • Could you try re-installing gurobipy by going into GUROBI_HOME and running python3 setup.py install?
  • If this does not work, could you try re-installing pytracemalloc?

  Gwyneth

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  Carlos Olivos

  August 30, 2022 14:03

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  Hi Gwyneth, thanks for answering. 

  I ran it with python 3.8, and it worked. Nevertheless, I got this error. 

  Set parameter Username

  Set parameter TokenServer to value "hpcflexlm1"

  Traceback (most recent call last):

    File "tsp.py", line 17, in <module>

      mdl = Model('TSP')

    File "src/gurobipy/model.pxi", line 68, in gurobipy.Model.__init__

    File "src/gurobipy/gurobi.pxi", line 32, in gurobipy.gurobi._getdefaultenv

    File "src/gurobipy/env.pxi", line 62, in gurobipy.Env.__init__

  gurobipy.GurobiError: Failed to connect to token server 'hpcflexlm1' (port 41954) - license file '/opt/asn/apps/gurobi_9.5.1/gurobi.lic'.  Consult the Quick Start Guide for instructions on starting a token server.

   

  I asked the staff of the supercomputer, and they asked me to use python3.7. Nevertheless, when I do that, the error related to _Py_tracemalloc_config pop-up. 

   

  Which option do you think is easier for them to solve? Unfortunately, I do not have access to either install or re-install packages. 

   

  Thanks 

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  Gwyneth Butera

  • Gurobi Staff

  August 30, 2022 17:58

  Hi Carlos -  As this now appears to be a license issue, I have opened a new ticket. I will reply there. G.

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