infeasible model problem

Answered

Chen Rui

May 03, 2024 12:23

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Hello Community,

               I have two subproblems that both have second order cone constraints, they are feasible. But when I put the constraints of the two subproblems within a model, the model is infeasible. The 'gurobi_iis' function is running exceptionally slow.What could be the problem?

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  Simranjit Kaur

  • Gurobi Staff

  May 06, 2024 00:51

  Hi Chen Rui,

  It is possible that a model containing constraints from the two feasible models becomes infeasible due to the interaction of the variable bounds and/or constraints. If finding the IIS is taking a long time, you may want to try inspecting the infeasibility using the gurobi_feasrelax() method. Please see the following articles:

  • How do I determine why my model is infeasible?
  • How do I change variable and/or constraint bounds to make an infeasible model feasible using feasRelax?

  Best regards,
  Simran

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