Quote:
Originally Posted by Joe42
I don't understand what you guys are saying. It's obviously a bug in Calibre, hence the error msg.
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It's not a bug now. It may have been in the past.
Your problem is that you had some null author_sort records. It shouldn't be possible to have that unless you specifically nulled them. It could have been by mistake or an old bug.
Try this:
1) First search for the problems:
author_sort:false
If you get results, check that the author is "Unknown" for all.
If it is, select them all, enter bulk metadata edit by pressing "e" and set both the author and author_sort to "Unknown." (if it isn't, then you've got some null author_sort records for valid author names, and you should fix those separately) That should solve your problem.
I would also search for author:"Author Unknown" and change that and the author_sort back to Unknown for the reasons above.