hello,

I coded the following small MIP model and trying to solve it concert technology;

#include<ilcplex/ilocplex.h>

ILOSTLBEGIN

int main() {

IloEnv env;

IloModel model(env);

IloNumVarArray x(env);

x.add(IloNumVar(env, 0, 1, ILOINT));

x.add(IloNumVar(env, 0, 1, ILOINT));

x.add(IloNumVar(env, 0, 1, ILOINT));

x.add(IloNumVar(env, 0, 1, ILOINT));

model.add (8 * x[1] + 2 * x[2] + x[3] + 4 * x[4] <= 10);

model.add(x[1] + x[2]<= 1);

model.add(x[3] + x[4] <= 1);

model.add(IloMaximize(env, 16 * x[1] + 10 * x[2] + 4*x[4]));

IloCplex cplex(model);

cplex.solve();

cout << "Objective Value" << cplex.getObjValue() << endl;

env.end();

system("pause");

return 0;

}

I get two errors at the same time in the output screen it is written :

X& IloArray::operator[] (IloInt i) : Out of bounds operation: index superior to size of array

Assertion failed: (i < _impl->getSize()) || (ILOSTD(cerr) << "X& IloArray::operator[] (IloInt i) : Out of bounds operation: index superior to size of array" << ILOSTD(endl), ilo_stop_assert()), file c:\program files\ibm\ilog\cplex_studio129\concert\include\ilconcert\iloenv.h, line 2248

on the other hand execution is stopped with the message:

Exception non gérée à 0x00007FFECEC3284E (ucrtbase.dll) dans Projet1.exe : Fermeture de programme requise suite à une erreur irrécupérable.

All the variables are binary integer btw;

How can I fix this problem ?

Thank you in advance

Hello Milena,

You added 4 IloNumVar into the IloNumvarArray x. So the right indices for this array are 0,1,2,3 . The value 4 leads to a "Out of bounds" exception.

I hope this clarifies,

Chris.

Thank you so much Chris :) It worked :)