MobileRead Forums
Register Guidelines E-Books Today's Posts Search

Go Back   MobileRead Forums > E-Book Readers > Kobo Reader
Reload this Page Epub without DRM, but "not authorized to open"

Notices

Reply
 
Thread Tools Search this Thread
Old 10-03-2024, 03:00 AM   #1
koboist
Junior Member
koboist began at the beginning.
 
Posts: 5
Karma: 10
Join Date: Aug 2023
Device: kobo glo hd
Epub without DRM, but "not authorized to open"
A friend got the "not authorized to open" message on their Kobo Clara 2E (tested firmware versions 4.35 to 4.38) and asked me to test that epub on my Kobo Glo. I was able to read the epub just fine. I also inspected the file, but there was no indication that it contained any kind of DRM. Both devices have never enabled WiFi.

Why is the Kobo Clara 2E not authorized to open that epub?
koboist is offline   Reply With Quote
Old 10-03-2024, 04:35 AM   #2
Aleron Ives
Wizard
Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.
 
Posts: 1,419
Karma: 16297052
Join Date: Sep 2022
Device: Kobo Libra 2
Reboot the Clara. That bug pops up now and then. It seems to be a problem with RMSDK (the EPUB reading engine), and there's probably nothing wrong with the book.
Aleron Ives is offline   Reply With Quote
Advert
Old 10-03-2024, 06:39 AM   #3
koboist
Junior Member
koboist began at the beginning.
 
Posts: 5
Karma: 10
Join Date: Aug 2023
Device: kobo glo hd
Thank you. We had already tried rebooting, deleting/re-adding the epub and flashing different firmware versions. It did not help. In the end we tried a factory reset and that actually helped.

Weird bug ...
koboist is offline   Reply With Quote
Old 10-03-2024, 07:17 AM   #4
Sirtel
Grand Sorcerer
Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.Sirtel ought to be getting tired of karma fortunes by now.
 
Sirtel's Avatar
 
Posts: 11,455
Karma: 230178176
Join Date: Jan 2014
Location: Estonia
Device: Kobo Sage & Libra 2
Quote:
Originally Posted by Aleron Ives View Post
Reboot the Clara. That bug pops up now and then. It seems to be a problem with RMSDK (the EPUB reading engine), and there's probably nothing wrong with the book.
Hmm. I've never actually seen this bug, and I read epubs on my Libra 2. I've read about it happening here, though. I wonder why it has not happened to me?
Sirtel is offline   Reply With Quote
Old 10-03-2024, 12:53 PM   #5
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 76,354
Karma: 136006198
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by Sirtel View Post
Hmm. I've never actually seen this bug, and I read epubs on my Libra 2. I've read about it happening here, though. I wonder why it has not happened to me?
You edit your eBooks and validate them. So you know the code is at least valid.
JSWolf is offline   Reply With Quote
Advert
Old 10-03-2024, 12:54 PM   #6
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 76,354
Karma: 136006198
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by koboist View Post
A friend got the "not authorized to open" message on their Kobo Clara 2E (tested firmware versions 4.35 to 4.38) and asked me to test that epub on my Kobo Glo. I was able to read the epub just fine. I also inspected the file, but there was no indication that it contained any kind of DRM. Both devices have never enabled WiFi.

Why is the Kobo Clara 2E not authorized to open that epub?
If this ever happens again, load the ePub into the calibre editor and use epubcheck (editor plugin) and the editor's error checker. If there are errors, fix them and then load the ePub again.
JSWolf is offline   Reply With Quote
Old 10-03-2024, 01:32 PM   #7
PeterT
Grand Sorcerer
PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.PeterT ought to be getting tired of karma fortunes by now.
 
PeterT's Avatar
 
Posts: 12,736
Karma: 75000000
Join Date: Nov 2007
Location: Toronto
Device: Libra H2O, Libra Colour
Quote:
Originally Posted by JSWolf View Post
If this ever happens again, load the ePub into the calibre editor and use epubcheck (editor plugin) and the editor's error checker. If there are errors, fix them and then load the ePub again.
Jon; this is an issue that I've seen occur occasionally on many of my Kobo's. It has NOTHING to do with the ePub; it seems to be a sporadic bug in the Kobo f/w that is resolved via a reboot of the Kobo.
PeterT is offline   Reply With Quote
Old 10-03-2024, 02:21 PM   #8
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 76,354
Karma: 136006198
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by PeterT View Post
Jon; this is an issue that I've seen occur occasionally on many of my Kobo's. It has NOTHING to do with the ePub; it seems to be a sporadic bug in the Kobo f/w that is resolved via a reboot of the Kobo.
I've never had this happen. I've had the Aura H2O since the weekend after Thanksgiving in 2014.

Besides, it cannot hurt to try just in case that is the reason (or not).
JSWolf is offline   Reply With Quote
Old 10-03-2024, 06:15 PM   #9
Aleron Ives
Wizard
Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.Aleron Ives ought to be getting tired of karma fortunes by now.
 
Posts: 1,419
Karma: 16297052
Join Date: Sep 2022
Device: Kobo Libra 2
Quote:
Originally Posted by koboist View Post
In the end we tried a factory reset and that actually helped.
Wow! You're the first person I've seen to report that a factory reset was necessary. Usually rebooting the Kobo is enough to clear the error.
Aleron Ives is offline   Reply With Quote
Old 10-03-2024, 07:34 PM   #10
ownedbycats
Custom User Title
ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.ownedbycats ought to be getting tired of karma fortunes by now.
 
ownedbycats's Avatar
 
Posts: 9,524
Karma: 64500175
Join Date: Oct 2018
Location: Canada
Device: Kobo Libra H2O, formerly Aura HD
Out of curiosity, mostly, was the book originally DRM-free or deDRM'd at some point?
ownedbycats is online now   Reply With Quote
Old 10-07-2024, 05:15 AM   #11
koboist
Junior Member
koboist began at the beginning.
 
Posts: 5
Karma: 10
Join Date: Aug 2023
Device: kobo glo hd
Quote:
Originally Posted by ownedbycats View Post
Out of curiosity, mostly, was the book originally DRM-free or deDRM'd at some point?
The epub has always been DRM free.
Last edited by koboist; 10-07-2024 at 05:18 AM.
koboist is offline   Reply With Quote
Old 10-07-2024, 07:58 AM   #12
Quoth
the rook, bossing Never.
Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.Quoth ought to be getting tired of karma fortunes by now.
 
Quoth's Avatar
 
Posts: 12,340
Karma: 92073397
Join Date: Jun 2017
Location: Ireland
Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper11
Quote:
Originally Posted by ownedbycats View Post
Out of curiosity, mostly, was the book originally DRM-free or deDRM'd at some point?
Happens even with ebooks from Gutenberg. It's a rare bug in ADE renderer, so not obvious what triggers it. Sometimes needs a reboot.
Quoth is offline   Reply With Quote
Old 10-07-2024, 08:20 AM   #13
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 76,354
Karma: 136006198
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by Quoth View Post
Happens even with ebooks from Gutenberg. It's a rare bug in ADE renderer, so not obvious what triggers it. Sometimes needs a reboot.
Another thing to do is load the eBook into the editor and resave it.
JSWolf is offline   Reply With Quote
Reply

Tags
kobo clara 2e

« Previous Thread | Next Thread »

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Kindle Voyage/Ubuntu 20.04: mount "not authorized" jeff47 Devices 1 05-01-2022 11:56 PM
Error launching Kindlet: "This item is not signed by an authorized developer." Hector47 Kindle Developer's Corner 2 06-04-2018 01:43 PM
Quick Fix for "This device is not authorized as a test Kindle" Gh0u1L5 Kindle Developer's Corner 3 02-12-2016 09:13 AM
"Failed to open the file!" - Fictionwise non-DRM ePubs on Libre Nakor Ectaco jetBook 6 03-04-2010 07:37 PM
"PK": Only text when I open in Sigil an ePub file generated with Calibre Terisa de morgan Sigil 3 12-14-2009 12:24 PM


All times are GMT -4. The time now is 10:53 AM.

Contact Us - FAQ - Guidelines - Privacy - Top

MobileRead.com is a privately owned, operated and funded community.