[manada]

Hello!

First off, I'd like to quickly thank everyone on this forum, you guys are great. I was able to get my library organized, my kobo filled up, and everything the way I like it be because of your posts and thoughts. It's much appreciated.

Unfortunately, as of this morning I seem to be frequently receiving errors, and I'm not sure what it means. I'm good with computers (I work in research informatics), but programming language baffles me. I just can't follow it.

I have calibre version 0.7.13, and am running on Windows Vista. Here is an example of the error I received as I selected a certain tag ("non-fiction", I believe) from the left menu to display only books with that tag:


"ERROR: ERROR: Unhandled exception: <b>AttributeError</b>:'NoneType' object has no attribute 'lower'

Traceback (most recent call last):
File "site-packages\calibre\gui2\library\models.py", line 956, in search
File "site-packages\calibre\utils\search_query_parser.py", line 181, in parse
File "site-packages\calibre\utils\search_query_parser.py", line 190, in _parse
File "site-packages\calibre\utils\search_query_parser.py", line 198, in evaluate
File "site-packages\calibre\utils\search_query_parser.py", line 201, in evaluate_and
File "site-packages\calibre\utils\search_query_parser.py", line 198, in evaluate
File "site-packages\calibre\utils\search_query_parser.py", line 226, in evaluate_token
File "site-packages\calibre\gui2\library\models.py", line 860, in get_matches
File "site-packages\calibre\gui2\library\models.py", line 827, in <lambda>
AttributeError: 'NoneType' object has no attribute 'lower'"


I received similar errors ("AttributeError: 'NoneType' object has no attribute 'lower") when adding books, converting books, searching for books, and sending books to my kobo. I tried restarting calibre, and double-checked for updates, but to no avail. I haven't changed anything in the settings recently, except the update a few days ago, and this only began today.

Any thoughts?

Thank you so much!