Decision Optimization

Hi all,

I have an error saying:

Unhandled exception at 0x7c809e8a in NIMCAsst.exe: 0xC0000005: Access violation reading location 0x154c6000.

I want to save the constraint into a two dimensional array flowConstraints_1b so I can update the constraint easily in the future. But my program crashes
when I assign an IloRange to an element of this two dimensional array.

Could you tell me what is the reason and how can I solve it?

	flowConstraints_1b = IloArray<IloRangeArray>(env, info.numberStations);
	
	for (int i = 0; i < info.numberStations; i++) {
		
		cout << i << endl;
		flowConstraints_1b.add(IloRangeArray(env, info.numberStations));
		
		for (int j = 0; j < info.numberStations; j++)
			if (i != j)
			{

				ostringstream os_1b;
				//error: access violation reading location 
				flowConstraints_1b[i][j] = IloRange(env, 0, info.arrivalRate_lambdaij[i][j] * openPairStations[i][j]
					- info.travelTimes_1muyij[i][j] * f[i][j], 0, os_1b.str().c_str());
				

				model.add(flowConstraints_1b[i][j]);

			}
	}

		flowConstraints_1b[i] = IloRangeArray(env, info.numberStations);
​

	flowConstraints_1b = IloArray<IloRangeArray>(env, info.numberStations);		for (int i = 0; i < info.numberStations; i++) {				cout << i << endl;		flowConstraints_1b.add(IloRangeArray(env, info.numberStations));				for (int j = 0; j < info.numberStations; j++)			if (i != j)			{				ostringstream os_1b;				//error: access violation reading location 				flowConstraints_1b[i][j] = IloRange(env, 0, info.arrivalRate_lambdaij[i][j] * openPairStations[i][j]					- info.travelTimes_1muyij[i][j] * f[i][j], 0, os_1b.str().c_str());								model.add(flowConstraints_1b[i][j]);			}	}