I added a few books and attempting to update the metadata triggers an error. When I selected the ebook listed as the last one being worked on and update that single item, the error is triggered. As near as I can tell, this happens when the ebook has nothing in the comments box as adding metadata removes the error.
Code:
calibre, version 2.57.1
ERROR: Unhandled exception: <b>TypeError</b>:object of type 'NoneType' has no len()
calibre 2.57.1 [64bit] embedded-python: True is64bit: True
Windows-8-6.2.9200 Windows ('64bit', 'WindowsPE')
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM && Modify ePub && SmartEject && Extract ISBN && Barnes & Noble && Kobo Utilities && Quality Check && Open With && Find Duplicates && Fantastic Fiction && Webscription && Goodreads && Obok DeDRM && FictionDB
Traceback (most recent call last):
File "calibre_plugins.koboutilities.action", line 863, in update_metadata
File "calibre_plugins.koboutilities.action", line 3558, in _update_metadata
TypeError: object of type 'NoneType' has no len()
Have fun....