The gurobi can not find the optimization solution

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Permanently deleted user

2021年12月15日 08:35

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Now，i am using the Gurobi 9.5. For my model, it seems gurobi does not find the optimization solution. 

some log:

Found heuristic solution: objective 1620295.6729

Root relaxation: objective 1.619696e+06, 121 iterations, 0.00 seconds (0.00 work units)

Nodes | Current Node | Objective Bounds | Work
Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time

0 0 1619895.93 0 38 1620295.67 1619895.93 0.02% - 0s

Cutting planes:
Gomory: 1

Explored 1 nodes (141 simplex iterations) in 0.02 seconds (0.01 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 1.6203e+06

Optimal solution found (tolerance 1.00e-04)
Best objective 1.620295672857e+06, best bound 1.620295672857e+06, gap 0.0000%

 

I will upload my model file. Could you help me take a look?

 

Thanks.

David

 

 

 

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• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 02:42 編集済み

  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 why not try our AI Gurobot?.
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  Jaromił Najman

  • Gurobi Staff

  2021年12月17日 13:18

  Hi David,

  According to the log snippet you posted, Gurobi does find the optimal solution. Indeed, the final gap is 0% meaning that Gurobi found the true optimal solution to this problem. Could you elaborate why you think that Gurobi does not find any solution?

  Best regards,
  Jaromił

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