infeasibility occurred after using the solution as input

ユーザーの入力を待っています。

Cass C

2022年11月10日 16:12

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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.

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  Simranjit Kaur

  • Gurobi Staff

  2025年11月16日 23:25

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
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  Jaromił Najman

  • Gurobi Staff

  2022年11月11日 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

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