Update RHS in C API

Answered

HengTzu Lee

May 09, 2022 09:43

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Hi I would like to update contraint's RHS several time with the same model.

I found ways to update RHS with Python and C#

but I don't find anything in C.

Can anyone help me, thank you!

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:37

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• 

  Jaromił Najman

  • Gurobi Staff

  May 09, 2022 12:03

  You can use the GRBsetdblattrelement function to change the RHS of a particular constraint.

  error = GRBsetdblattrelement(model, "RHS", 0, 10);
  if (error) goto QUIT;

  The above would change the RHS of 0th constraint to \(10\).

  You can also change the RHS of multiple constraints at once with the GRBsetdblattrarray function.

  Best regards, 
  Jaromił

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