Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ocrfeeder/studio/widgetModeler.py", line 454, in __imagePreProcessingFinishedCb
    self.__addImage(image_path, select_image)
  File "/usr/lib/python2.7/dist-packages/ocrfeeder/studio/widgetModeler.py", line 459, in __addImage
    image_path = os.path.abspath(os.path.expanduser(image_path))
  File "/usr/lib/python2.7/posixpath.py", line 252, in expanduser
    if not path.startswith('~'):
AttributeError: 'NoneType' object has no attribute 'startswith'