Unhandled exception at 0x008420fa in mlp.exe: 0xC0000005: Access violation writing location 0x0000007f.

Unhandled exception at 0x008420fa in mlp.exe: 0xC0000005: Access violation writing location 0x0000007f.

void MLP::loaddata(){

	
	 

	 const char *trn_file="Winners.trn";
	const char *tst_file="Winners.tst";

	ifstream Trn(trn_file);
	ifstream Tst(tst_file);
	for(int i= 0;i<NumTrn;i++)
	{
		Trn>>TrainLabels[i];
		for(int j=0;j<NumFe;j++)
			Trn>>TrainData[i][j];
	}
	for(int i= 0;i<NumTst;i++)
	{
		Tst>>TestLabels[i];
		for(int j=0;j<NumFe;j++)
			Tst>>TestData[i][j];
	}

for (int i= 0; i<NumTrn; i++){

      for (int j= 0;j<NumFe;j++)
      //input
      cvSetReal2D(&TrnData, i, j, TrainData[i][j]);
      //Output
      cvSet1D(&TrnLabels, i, cvScalar(TrainData[i][NumFe]));
    }

    //for test matrix
    for (int i=0; i<NumTst; i++){

      for (int j=0;j<NumFe;j++)
      //input
      cvSetReal2D(&TstData, i, j, TestData[i][j]);
      //Output
      cvSet1D(&TstLabels, i, cvScalar(TestData[i][NumFe]));
    }
     // CALCMLP( TrnData,  TrnLabels, TstData, TstLabels);
}