Change in Exceptions in 7.5.0

[Stuart Mitchell]

please note the issue raised against the pulp library with the lastest 7.5.0 release

https://github.com/coin-or/pulp/issues/141

tldr;

Gurobi  changed the error returned when an attribute is not present on a variable (e.g. Var.x) from gurobipy.GurobiError to AttributeError. This caused an issue with the pulp solver.

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Stuart Mitchell

PhD Engineering Science

Extraordinary Freelance Programmer and Optimisation Guru

www.stuartmitchell.com

[Tobias Achterberg]

Yes, sorry that this caused inconveniences. Changing the exception type was
actually a user request.

Regards,

Tobias