infeasibility occurred after using the solution as input

Awaiting user input

Cass C

November 10, 2022 16:12

• 
• 
• 

Hi 

Just a very wired issue happened to my case. 

My previous problem was finding the minimum cost of the system, considering the operation of each component. Then I got the solution and wanted to use that as an input for my next step. 

The process is shown as follow:

It worked from step 1 to step 2 but failed from step 2 to step 3. Theoretically, I think if I got feasible solution in step 2, then (F1,2, F2,2, F3,2,….Fk,2) in step 3 at least can be equivalent to those in step 2. I am really confused about it.

0

• 

  Jaromił Najman

  • Gurobi Staff

  November 11, 2022 15:26

  Hi Cass,

  It is really hard to understand what the issue is without a concise example showing the issue. Could you please elaborate a bit more on the issue? Maybe you could provide a minimal working example showing the issue.

  If you are having problems with infeasibility, maybe the Knowledge Base article How do I determine why my model is infeasible? can help.

  If you mean that a solution is not accepted as MIPStart for an optimization, then Gurobi should print which constraint is violated by the provided solution point if you provided a full solution.

  Best regards, 
  Jaromił

  0

Please sign in to leave a comment.