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Old 01-11-2026, 03:08 PM   #1
dan2the6th
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Bookmark error
When I attempt to set a bookmark in the reader, I always get an error popup that says, "Could not calculate position in book". Any advice on this? I read EPUB books only. Latest version of Calibre.
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Old 01-11-2026, 03:19 PM   #2
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You say Reader, not Viewer. Is this (message) on your phone?
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Old 01-12-2026, 11:11 AM   #3
dan2the6th
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I'm sorry, I meant the Viewer. This is on Windows 11.
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Old 01-12-2026, 11:59 AM   #4
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Quote:
Originally Posted by dan2the6th View Post
I'm sorry, I meant the Viewer. This is on Windows 11.
Something about that book is probably the issue. Like it is Images only. Does it pass EPUB check?

(Per my sig, I am stuck on w10, but I am running beta 4 of Calibre 9 and no viewer issues. )
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Old 01-13-2026, 07:04 AM   #5
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Yes we will need access to the book in question to be able to say more.
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Old Yesterday, 11:38 AM   #6
dan2the6th
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Sorry, I spent all day yesterday trying to reply, and I kept getting something about "this action is rate limited, try again in a few seconds."

Anyway -- my problem is not specific to one book. This happens no matter what book I'm reading. I'll still send you a book to check out if you like. If I do that, I'm supposed to use that ScrambleEbook thing, right?
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Old Yesterday, 01:07 PM   #7
kovidgoyal
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yes, if its copyrighted use scramblebook
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Old Yesterday, 08:04 PM   #8
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OK, I've uploaded a book called "Lolly Willowes", more or less at random. It has the same problem with bookmarks.
Attached Files
File Type: epub Lolly Willowes - Warner, Sylvia Townsend_scrambled.epub (279.5 KB, 2 views)
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Old Yesterday, 08:44 PM   #9
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Tried inserting bookmarks at various positions in the book, no errors. What version of calibre are you running exactly and post the full details from the error message.
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Old Today, 01:27 PM   #10
dan2the6th
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I've got Calibre 8.16.1. The error message is exactly what I put in my first post; no other information.

OK, something weird: if I do CTRL-ALT-B to add a bookmark, it works! But if I hit ESC and then click on Bookmarks, and then hit New in the Bookmarks window, I get that error every time.

At least now I know how to add a bookmark!
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