Pulp.pulpTestAll() Test Failed, Too Many Values To Unpack

My OS is window 7, Pulp version is 1.6.1, gurobi version is 7.0.1. gurobipy can be successfully imported. pulp.solvers.GUROBI did pass the test, so I could use gurobi. However pulp

Solution 1:

I got the same error. It was a problem with Gurobi_CMD. Gurobi passes all the tests, but they fail on Gurobi_CMD.

I solved it by uninstalling and reinstalling Gurobi, and changing the .cfg files for PuLP to correctly point to the Gurobi installation.