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I'm working with PuLP 1.6 and had the FICO XPRESS solver installed already before installing PuLP.

When I run pulp.pulpTestAll() it doesn't show the XPRESS solver as unavailable but instead the test fails with the message:

The system cannot find the path specified. pulp.constants.PulpError: Tests Failed

How can I configure a PuLP solver, specifically the path? The XPRESS bin folder is in my path currently.

Edit: I have found the pulp.cfg.winand tried enter my path in some different ways (e.g. XpressPath = C:\xpressmp\bin\optimizer.exe, but it didn't change the error.

Daniel Junglas
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J. Schneider
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1 Answers1

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I could not find a solution on how to get the XPRESS interface working in PuLP (I also posted an issue to GitHub, but we couldn't find a solution either (https://github.com/coin-or/pulp/issues/143)).

However, I realized that XPRESS itself offers a Python package within their newer versions. I was not aware of this in the beginning and ended up using the their package, which works just fine and is similar to PuLP. Maybe this can help someone.

J. Schneider
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