unbdray

Answered

Zahra Hoobakht

January 21, 2023 22:35

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Hi

my second stage problem is infeasible. I would appreciate it if you could say how can I extract unbounded rays for the dual of the second stage problem?

I write dual of it and I used 

Dualproblem.setParam('InfUnbdInfo', 1) 
dualsp=Dualproblem.getAttr('UnbdRay', Dualproblem.getVars())

are they correct?

Related to

• Infeasible
• Unbounded

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  Jaromił Najman

  • Gurobi Staff

  January 23, 2023 12:41

  Hi Zahra,

  An unbounded ray is only available if your model is unbounded, i.e., if \(\texttt{model.Status == GRB.UNBOUNDED}\). If your model is infeasible, you can retrieve a Farkas Proof or try to determine why your model is infeasible as described in How do I determine why my model is infeasible?

  Best regards, 
  Jaromił

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