[Joe42]

I don't understand what you guys are saying. It's obviously a bug in Calibre, hence the error msg. Kovid killed my bug report saying it's invalid and provided no reason other than "see thread for details." Too bad there's no details to see.

I guess I'll just live with using "Author Unknown" since that seems to work fine. Is it possible for me to change the default "Unknown" to "Author Unknown"?

As for my ebooks possibly being old, I've been building my collection for less than 1 year, so none of the files are very old. Besides, the files themselves should have no bearing on how Calibre exports them since all it's doing it creating folders and naming files according to my template.

Also when exporting, Calibre automatically updates the metadata within the files themselves, so older formats shouldn't be a problem.

I did find out that when author is Unknown, whether it's automatic or I type it, that only applies to author_sort, not author.