Hi Valerio, Thanks for helping!
self.data_info[0][instanceNum]

contains:

‘/media/storage2/~/train/color_007431.png’

So basically self.data_info[0] contains location of RGB images, self.data_info[1] contains depth images in local system and usage refers to train or validation.
Can you please mention how I can obtain the full error stack trace?
I just see this in the console:

File “~/.pycharm_helpers/pydev/_pydevd_bundle/pydevd_resolver.py”, line 215, in resolve
return getattr(dict, key)
AttributeError: ‘dict’ object has no attribute ‘self’