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solvergurobi
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Reputation: 37

Gurobi Root Simplex Stuck after 20 minutes

I use GUROBI to solve a large MILP. The LP is solved in 3 minutes. After that the crossover begins it calculates about 20 minutes. Then it drops a variable from basis and does not give any console output for the next 2 hours. I'm using the barrier method and I put crossover on -1 so that it is automatically chosen.

The log looks like this after 3 hours:

enter image description here

I have tried running it multiple times with the same thing happening.

Any ideas on how to fix that or am I just not waiting long enough?

Upvotes: 0

Views: 151

Answers (1)

Greg Glockner
Greg Glockner

Reputation: 5653

Looks like your model has numerical issues; please read Guidelines for Numerical Issues in the Gurobi Reference Manual.

Upvotes: 0

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