Training fisher faces , program exited with code -1073741819

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I am working on a project based on face recognition and modefied the code here such that the image file paths are read using Qt directory libraries and is working fine. Problem occurs when I try to train the fisher faces model ,i.e the model->train() call let the app to crash...and Qt creator says the program exited with code -1073741819

void Dialog::on_btnAdd_2_clicked()
{
    tmrTimer->stop();

    dir=QDir(directory);
    QFileInfoList files;
    QFileInfo file;
    QString filen;

    char name[10];
    int i,j;
    std::string str;
    std::string filename;

    dir.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
    files=dir.entryInfoList();
    int nofiles;

    nofiles=files.size();
    for(i=0;i<nofiles;i++)
        {
            file=files.at(i);
            filen=file.baseName();
            filename=filen.toStdString();
            strcpy(name,filename.c_str());

            for(j=0;name[j]!='-';j++);
            name[j]='\0';                                   //label value ends with '-' in image names

            filen=file.absoluteFilePath();
            str=filen.toStdString();

            /*
            cv::Mat offimage=cv::imread(str.c_str(),-1);

            cv::namedWindow("face",WINDOW_AUTOSIZE);        //show retrieved image in a window
            cv::imshow("face",offimage);
            cvvWaitKey(1000);
           */

            newImages.push_back(cv::imread(str.c_str(),CV_LOAD_IMAGE_GRAYSCALE));
            newLabels.push_back(atoi(name));


        }


    ui->boxConsole->appendPlainText("Training Started....!!");

    cv::Ptr<cv::FaceRecognizer> model = cv::createFisherFaceRecognizer();
    model->train(newImages,newLabels);       //this causes the error

    //strcat(home,"\\data.xml");

    //model->save(home);

    ui->boxConsole->appendPlainText("Training Completed!!");
    tmrTimer->start();
}

I am using windows 7 environment and ide is Qt creator. The crash report by the OS says that :

Problem signature:
  Problem Event Name:   APPCRASH
  Application Name: QtTracker3.exe
  Application Version:  0.0.0.0
  Application Timestamp:    51035d17
  Fault Module Name:    libopencv_core242.dll
  Fault Module Version: 0.0.0.0
  Fault Module Timestamp:   50da6896
  Exception Code:   c0000005
  Exception Offset: 000a38f0
  OS Version:   6.1.7600.2.3.0.256.1
  Locale ID:    1033
  Additional Information 1: 0a9e
  Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
  Additional Information 3: 0a9e
  Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

full code can be found here