Segmentation fault      (core dumped) error

Hi I have built your program and I am using the exe version to run your program. I am managing to run it successfully for image sample t13 and saving the Line_i.jpg for each  but unfortunately for any other sample image given I am not getting the labels.png and Line_i.png but instead I am getting the error above: Segmentation fault      (core dumped). Any idea why is that?