How to find a solution in Gurobi

Santanu Sarkar

2019年10月29日 19:18

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I have 100 unknowns x_1,..., x_{100} and 100 inequalities like 10 <= x_1 + 4x_3 +20 x_{100}<=20 etc. For every inequality left side is 10 and right side is 20. I want a binary solution. That is x_i's are either 0 or 1. I use Gurobi to get one solution. But after running 6 days, my machine got hang. Is there any trick in Gurobi to get a solution? I have no optimization function.

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  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 03:21 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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  Eli Towle

  • Gurobi Staff

  2019年10月29日 20:35

  Hi Santanu,

  How exactly did you model this problem so that Gurobi could solve it? Do you have the Gurobi log file output? Thanks!

  Eli

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  Santanu Sarkar

  2019年10月30日 15:20

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  Yes, I wrote in .lp file. Yes, I have that log file.

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  Matthias Miltenberger

  • Gurobi Staff

  2019年10月31日 08:20

  Hi Santanu,

  Can you please share that log file with us? We may find something in there to help you with your problem.

  Thanks,
  Matthias

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  Silke Horn

  • Gurobi Staff

  2019年10月31日 08:47

  Hi Santanu,

  Could you also share your LP file?

  Thanks,
  Silke

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  Gwyneth Butera

  • Gurobi Staff

  2019年10月31日 14:13

  Hi Santanu - Can you post the file directly to the forum? Your email came to our spam folder with the file not attached. Thanks!

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