c++ Error code = 10003 Not right attribute

回答済み

Qiong Wang

2021年11月19日 15:59

• 
• 

I'm using gurobi in a C++ program on macOS (terminal mode). Whenever I use get(GRB_DoubleAttr_X), I always get "Error code =10003 Not right attribute". Going through output file created by model.write(), I verified that the LP is correctly formulated. The optimization step seems have gone through.The same program works on Windows (visual studio) but not here. The library I'm using is

".......-I  /Library/gurobi950/macos_universal2/include/ -L /Library/gurobi950/macos_universal2/lib -lgurobi_c++ -lgurobi95 -lm"

Relevant code is as follows (I also inserted model.update() after model.optimize(), still does not work). 

#include "gurobi_c++.h"

using namespace std;

GRBEnv env = GRBEnv(true);

env.start();

GRBModel model = GRBModel(env);               

const int n_variable; 

// set n_variable to a positive integer value

GRBVar p[n_variable];

for (int i = 0; i < n_variable; i++)

        p[i] = model.addVar(0, GRB_INFINITY, 0.0, GRB_CONTINUOUS, "p" + to_string(i));

// add constraints, objective etc. 

model.optimize();

try {

        cout << p[0].get(GRB_DoubleAttr_X) << endl; // getting Error code 10003

// or double x= p[0].get(GRB_DoubleAttr_X); getting the same error code

}

catch (GRBException e){

        cout << "Error code = "<< e.getErrorCode()<< endl;

        cout << e.getMessage() << endl;

}

0

• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 02:44 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?.
• 

  Jaromił Najman

  • Gurobi Staff

  2021年11月22日 09:18 編集済み

  This error occurs if you use an outdated version of the \(\texttt{gurobi_c++.h}\) file. Is it possible that you recently updated to v9.5.0 but are still using the \(\texttt{gurobi_c++.h}\) file from v9.1.2?

  I was able to reproduce the issue by running v9.5.0 and using the old \(\texttt{gurobi_c++.h}\) file from v9.1.2. Switchting to \(\texttt{gurobi_c++.h}\) file from v9.5.0 solves it.

  Best regards,
  Jaromił

  0

投稿コメントは受け付けていません。