Error running ./gen.py 1000

[pendex900x]

Got this error:

py gen.py 1000

Traceback (most recent call last):
  File "gen.py", line 287, in <module>
    for img_idx, (im, c, p) in enumerate(im_gen):
  File "gen.py", line 278, in generate_ims
    fonts, font_char_ims = load_fonts(FONT_DIR)
  File "gen.py", line 265, in load_fonts
    FONT_HEIGHT))
  File "gen.py", line 73, in make_char_ims
    im = im.resize((int(width * scale), output_height), Image.ANTIALIAS)
  File "C:\Users\X\AppData\Local\Programs\Python\Python37-32\lib\site-packages\PIL\Image.py", line 1801, in resize
    im = im.resize(size, resample, box)
  File "C:\Users\X\AppData\Local\Programs\Python\Python37-32\lib\site-packages\PIL\Image.py", line 1806, in resize
    return self._new(self.im.resize(size, resample, box))
ValueError: height and width must be > 0

Why this happend??