PULP_CBC_CMD: Not Available (check permissions on cbc)

[DimKoimtzoglou]

What did you do?

I ran the process in a Dataproc cluster and it failed on the Friday 20th till and including Monday 23rd of June.

The process called
solve(pulp.PULP_CBC_CMD(msg=False))

The Pulp version used is the 2.8.0

What did you expect to see?

The process runs daily and I have not encountered any issues in the past.

What did you see instead?

File "/opt/conda/default/lib/python3.10/site-packages/pulp/pulp.py", line 1883, in solve status = solver.actualSolve(self, **kwargs) File "/opt/conda/default/lib/python3.10/site-packages/pulp/apis/coin_api.py", line 340, in actualSolve raise PulpSolverError( pulp.apis.core.PulpSolverError: PULP_CBC_CMD: Not Available (check permissions on cbc)

Useful extra information

What operating system are you using?

Linux: (debian 11 )

I'm using python version:

• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• Other: ___

I installed PuLP via:

It's preinstalled in the cluster and it is preinstalled using conda.

Did you also

• Tried out the next github version: 2.9.0 and it was resolved.

[pchtsp]

You refer to versions 2.8 and 2.9 yet, the current version in pypi is 3.2.1.

[pchtsp]

We do not test installations with conda. If it works or not, we're unaware.

[DimKoimtzoglou]

Thank you for the reply @pchtsp!

You refer to versions 2.8 and 2.9 yet, the current version in pypi is 3.2.1.

Yes, but I am using an older version.

We do not test installations with conda. If it works or not, we're unaware.

Ok, clear so can also be due to conda.

[tkralphs]

If you want to use PuLP with Cbc installed with conda, you are probably better off just installing PuLP itself with conda: https://github.com/conda-forge/pulp-feedstock.