Error in setting different LP method

Answered

HengTzu Lee

May 16, 2022 07:34

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Hi

I'm building LP model in the hope to test the speed with different methods.

Therefore, after creating a new model, I set the method attribute using the code below.

GRBnewmodel(LPenv, &LPmodel, "LP", 0, NULL, NULL, NULL, NULL, NULL);
error = GRBsetintattr(LPmodel, "Method", 0);
if (error) printf("Error in setting LP method.\n");

However, it keeps showing the error message.

Can anyone advise me where is the problem?

Thank you!

0

• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:37

  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.
• 

  Jaromił Najman

  • Gurobi Staff

  May 16, 2022 07:56 Edited

  Method is a parameter and not an attribute. Thus, you have to use the GRBsetintparam function.

  GRBnewmodel(LPenv, &LPmodel, "LP", 0, NULL, NULL, NULL, NULL, NULL);
  error = GRBsetintparam(GRBgetenv(LPmodel), "Method", 0);
  if (error) printf("Error in setting LP method.\n");

  Best regards, 
  Jaromił

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