Thread: Calibre 3.39.1 doesn't recognize EPUB format
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Old 02-11-2019, 02:00 PM   #4
chaley
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Quote:
Originally Posted by theducks View Post
CantOpenError: CantOpenError: unable to open database file

Has nothing to do with EPUB (or any other format)
The anti-virus or a file sync program on the offending computer can also cause this problem.
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