Thread: ERROR when converting EPUB to PDF?
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Old 09-18-2021, 11:21 PM   #3
DNSB
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Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
Looking at your posted log, DeDRM makes it pretty clear that it could not remove DRM from this epub.

Quote:
DeDRM v7.2.1: Trying to decrypt lm9xa40j.epub
DeDRM v7.2.1: Verifying zip archive integrity
DeDRM v7.2.1: “lm9xa40j.epub” is neither an Adobe Adept nor a Barnes & Noble encrypted ePub
I tend to suspect that since this is a rather expensive textbook, that the epub version may be using Adobe's hardened DRM which DeDRM will not remove.

I'm a bit surprised since I was under the impression that DeDRM only removed DRM when an ebook was imported into calibre and not as part of the conversion pipeline.
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