Clicking "Next Image" causes program to quit unexpectedly

[hliang]

• OS: macOS Catalina 10.15
• PyQt version: 5.15

After labelImg is started, clicking "Next Image" button will cause the program to quit unexpectedly.

Traceback (most recent call last):
  File "/path/to/labelImg/labelImg.py", line 1368, in open_next_image
    filename = self.m_img_list[0]
IndexError: list index out of range
python-BaseException

[pletnes]

I believe this issue can be closed now @tzutalin?

[totheinf]

The path that you put your data, labels and labelImg in must only contain english letters. NO space or any special char or even your own language alphabet. It was the reason that caused the same problem for ne.