Thread: editor open wrong book when showing books on device
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Old 02-22-2014, 08:59 PM   #19
davidfor
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Quote:
Originally Posted by DiapDealer View Post
I understand the desire to warn about using caution when editing a file on the device, but there's nothing "really" dangerous about it. It won't hurt the device at all, and the file on the device is hardly going to be considered the master copy/backup of the ebook (even under the weirdest of circumstances)--especially if calibre is being used by the end-user. I say experiment away! Just keep good backups.
As the others have said, Kobo devices have some problems with this. I mentioned this because I know cybmole has just bought one.

There are two problems:

- If the file size changes, then current firmware will remove all info about the book from the internal database and then add it as a new book. This means you lose the reading status and shelves it is on. Older firmware deleted the book and the database records. If a book is resent from calibre, the driver will update the size in the database to prevent this from happening.

- When the book is first seen, the metadata is extracted and stored. With this is the TOC from the NCX. If the structure of an epub is changed or the TOC updated, it doesn't get reread. This will cause problems when reading the book. The most likely problem is that it won't reopen in the right spot. But, in past firmware, it could cause a crash.
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