Unable to read MPS file

Answered

A.Omidi

• April 05, 2019 21:00

Hello everybody,

 

I have a problem with reading a (.mps) file in Java API. This is Java code:

*===========================

import gurobi.*;

public class Lp2 {
public static void main(String[] args) {
try {
GRBEnv env = new GRBEnv();
GRBModel model = new GRBModel(env);

model.read("C:\\Users\\A.Omidi\\Desktop\\flow_shop.mps");
model.optimize();

int optimstatus = model.get(GRB.IntAttr.Status);
System.out.println(optimstatus);

// Dispose of model and environment
model.dispose();
env.dispose();

} catch (GRBException e) {
System.out.println("Error code: " + e.getErrorCode() + ". " + e.getMessage());
}
}
}

*===========================

While I run the code I have a error: "Error code: 10012. Can't import file 'C:\Users\A.Omidi\Desktop\flow_shop.mps' into a model".

In the other software, I don't have any problem.  Could you tell me please, is there a specific way to read (LP/MPS) file in Java?

 

Regards

Omidi. A

0

• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:59

  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?.
• 

  Michael Winkler

  Gurobi Staff

  • April 08, 2019 13:01
  • Edited

  Hi,
  
  
  to create a Gurobi model from a file you need to pass the file name to the model
  constructor, e.g., 
  
  GRBModel model = new GRBModel(env, "C:\\Users\\A.Omidi\\Desktop\\flow_shop.mps");
  
  . See also https://www.gurobi.com/documentation/8.1/examples/load_and_solve_a_model_fro.html.
  The model.read() method can be used to read in a parameter file or attributes
  files, see also http://www.gurobi.com/documentation/8.1/refman/java_grbmodel_read.html.
  
  Best,
  Michael
  
  

   

  0
• 

  A.Omidi

  • April 08, 2019 17:58

  

  

  

  Hi,

  Thanks so much for useful replay.

  Its work fine.

   

  Regards

  Omidi. A

  0

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