Check failed when training on VOC07

[huangh12]

Hello,
I am trying to train the dilation code on VOC07. There are 209 images in training set in totall. After compiling the caffe-dilation, I run as the document for training and got an error as the following images showed.

I find the corresponding code in bin_label_data_layer.cpp. I know it is the problem occurs in the 100th line. But I can't figure out what specific problem it is. Can anyone explain it for me? Thanks in advance!