Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Readers > Kobo Reader

Notices

Reply
 
Thread Tools Search this Thread
Old 05-25-2010, 08:26 PM   #1
onaeD
Junior Member
onaeD began at the beginning.
 
Posts: 4
Karma: 12
Join Date: May 2010
Device: Kobo
Unhappy Kobo freezing after transferring ePub

After transferring an ePub file (from Manning Publications) and "ejecting" my Kobo, it freezes during the "processing new content" step, requiring a hard reset, after which the book doesn't appear in the library (although still being on the File System)

The progress-bar just sits at about 10%

The file is about 13MB.

Anyone else having a similair issue?

Last edited by onaeD; 05-25-2010 at 08:33 PM.
onaeD is offline   Reply With Quote
Old 05-25-2010, 11:35 PM   #2
pholy
Booklegger
pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.pholy ought to be getting tired of karma fortunes by now.
 
pholy's Avatar
 
Posts: 1,786
Karma: 7999034
Join Date: Jun 2009
Location: Toronto, Ontario, Canada
Device: BeBook(1 & 2010), PEZ, PRS-505, Kobo BT, PRS-T1, Playbook, Kobo Touch
I have had a similar problem with a couple of books. I found that when I unzipped them, they had a huge .css file. When I opened that I found thousands of classes defined, mostly identical. It was a pretty bad conversion, and not much I could do. (except try a different brand of reader...) A 13MB epub is pretty huge, it may have a lot of pictures or embedded fonts. (It should not be a malformed epub file, but it is possible.) I'm not sure exactly what makes it choke.

The files I looked at did not have DRM, of course, or I couldn't have looked at them. I think they were from BooksOnBoard, but I'm not sure.
pholy is offline   Reply With Quote
 
Enthusiast
Old 05-26-2010, 02:51 AM   #3
artificial
Groupie
artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.
 
artificial's Avatar
 
Posts: 179
Karma: 6328
Join Date: May 2010
Location: Melbourne, Australia
Device: Kobo eReader
Quote:
Originally Posted by pholy View Post
It should not be a malformed epub file, but it is possible.
Most converted epubs are a mess, and don't conform to the epub specification.

I've had an epub that my Kobo Reader refused to read (didn't crash, but wouldn't display the book), though my desktop epub viewer handled it without concern.

I ran the file through an epub validator, and fixed all of the errors by hand, after which the Kobo Reader would display the book correctly.

Admittedly, there was a major problem with this particular epub: all the html files contained a hash (#) in the filename, and given that the hash has a special meaning within URLs I'm not surprised the Kobo Reader choked when parsing the epub!

But my story does point to the unreliability of the conversion process, and the fact that certain epubs can mess with your ereader.
artificial is offline   Reply With Quote
Old 05-26-2010, 08:05 PM   #4
onaeD
Junior Member
onaeD began at the beginning.
 
Posts: 4
Karma: 12
Join Date: May 2010
Device: Kobo
Thanks. I would have expected an ePub eBook purchased directly from the publisher would have conformed to the standard

Thanks for the link to the validator. I'll run my eBook through it and contact Manning Publications with any results.



Oh yes, I forgot to mention my Desktop ePub reader (Mobipocket Reader) displays the book no problem.

Last edited by onaeD; 05-26-2010 at 08:08 PM.
onaeD is offline   Reply With Quote
Old 05-26-2010, 08:27 PM   #5
artificial
Groupie
artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.
 
artificial's Avatar
 
Posts: 179
Karma: 6328
Join Date: May 2010
Location: Melbourne, Australia
Device: Kobo eReader
Quote:
Originally Posted by onaeD View Post
Thanks. I would have expected an ePub eBook purchased directly from the publisher would have conformed to the standard
Sorry, I overlooked the fact that it was a purchased epub when I read your original post! My experience only relates to epubs converted from another format using Calibre.
artificial is offline   Reply With Quote
Old 05-26-2010, 10:52 PM   #6
PeterT
Taking a break; Fed up
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: 6,624
Karma: 43654592
Join Date: Nov 2007
Location: Toronto
Device: Wife: Touch, Arc, Vox Me: Nexus 7, Glo
Quote:
Originally Posted by onaeD View Post
Oh yes, I forgot to mention my Desktop ePub reader (Mobipocket Reader) displays the book no problem.
I didn't know Mobipocket Reader could read ePubs! My version 6.02 doesn't seem able to.
PeterT is online now   Reply With Quote
Old 05-26-2010, 11:24 PM   #7
RedRoverJ
Zealot
RedRoverJ has a complete set of Star Wars action figures.RedRoverJ has a complete set of Star Wars action figures.RedRoverJ has a complete set of Star Wars action figures.RedRoverJ has a complete set of Star Wars action figures.
 
Posts: 125
Karma: 314
Join Date: Apr 2010
Location: Canada, Eh!
Device: Blackberry Curve 8330, Kobo
Mobipocket will convert to mobi format when you import an ePub.
RedRoverJ is offline   Reply With Quote
Old 05-27-2010, 12:37 AM   #8
onaeD
Junior Member
onaeD began at the beginning.
 
Posts: 4
Karma: 12
Join Date: May 2010
Device: Kobo
Cool

Quote:
Originally Posted by onaeD View Post
I'll run my eBook through it and contact Manning Publications with any results.
Sure enough, the ePub validator indicated a host of problems. I've contacted Manning Publishing to let them know
onaeD is offline   Reply With Quote
Old 05-27-2010, 11:05 AM   #9
techie42
Zealot
techie42 has learned how to buy an e-book online
 
Posts: 138
Karma: 76
Join Date: May 2010
Location: Toronto
Device: KOBO and iPad
Quote:
Originally Posted by artificial View Post
Most converted epubs are a mess, and don't conform to the epub specification.
...

But my story does point to the unreliability of the conversion process, and the fact that certain epubs can mess with your ereader.
I wqas using Calibre to convert files and (after I got the hang of it) I have had very few problems (aisde from the firmware bug in kobo text resize.)
techie42 is offline   Reply With Quote
Old 05-27-2010, 05:35 PM   #10
artificial
Groupie
artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.artificial got an A in P-Chem.
 
artificial's Avatar
 
Posts: 179
Karma: 6328
Join Date: May 2010
Location: Melbourne, Australia
Device: Kobo eReader
Quote:
Originally Posted by techie42 View Post
I wqas using Calibre to convert files and (after I got the hang of it) I have had very few problems
I hope I didn't sound like I was running down Calibre! I think Calibre is the bees knees!

It's just my experience that converted epubs don't conform to the epub specification, although most non-validating epubs will render perfectly well nonetheless.

I would compare it to web page validation - the vast majority of web pages don't conform the W3C specifications, but web browsers manage to render them without observable problems.
artificial is offline   Reply With Quote
Old 05-29-2010, 12:14 AM   #11
Verencat
Wizard
Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.Verencat read the news today, oh boy.
 
Verencat's Avatar
 
Posts: 2,616
Karma: 96491
Join Date: May 2009
Location: Montreal, Qc
Device: xxx
Quote:
Originally Posted by artificial View Post
Most converted epubs are a mess, and don't conform to the epub specification.

I've had an epub that my Kobo Reader refused to read (didn't crash, but wouldn't display the book), though my desktop epub viewer handled it without concern.

I ran the file through an epub validator, and fixed all of the errors by hand, after which the Kobo Reader would display the book correctly.

Admittedly, there was a major problem with this particular epub: all the html files contained a hash (#) in the filename, and given that the hash has a special meaning within URLs I'm not surprised the Kobo Reader choked when parsing the epub!

But my story does point to the unreliability of the conversion process, and the fact that certain epubs can mess with your ereader.
So I'm screwed.

Did I type that out loud?

I crashed the Kobo twice with epubs that I converted myself with Calibre, and after running the books through the validator (thanks for that), I've found loads of errors. But of course I have no clue of what they mean, nor how to fix them. I'll try converting the books to pdf, I can handle them a little better.

Thanks for this thread, everyone, I can now stop banging my head on the wall!

edit: marvelous pdf. Yay. Off to read now.

Last edited by Verencat; 05-29-2010 at 12:37 AM.
Verencat is offline   Reply With Quote
Old 06-07-2010, 06:11 PM   #12
saskee
Junior Member
saskee began at the beginning.
 
Posts: 6
Karma: 10
Join Date: May 2010
Device: kobo
Recurring freezes during processing

I had a similar problem after attempting to transfer a book using calibre. The book was an epub format. I checked it with epub validator and it came back as valid. After resetting (several times) and attempting to remove the offending file using calibre, the same problem with freezing kept occuring. Even if I just plugged in the Kobo and then ejected and unplugged, the same freezing would occur.

I then reset the machine using the Kobo menu which was supposed to remove all books and settings that I had added. It seemed to do that. I then tried to use the Kobo software to add back a book purchased from Kobobooks and the same freeze occured. However the Kobo showed the book I added except for the cover.

Calibre still shows the books that I had added since getting the Kobo as present on the device.

I'm stumped, but before I give up and return the device or seek technical support I thought I'd ask if anyone else has had this problem and solved it.

Thank you,

Jim
saskee is offline   Reply With Quote
Old 06-07-2010, 06:47 PM   #13
Stinger
Asha'man
Stinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-books
 
Stinger's Avatar
 
Posts: 335
Karma: 844
Join Date: May 2010
Location: Canada
Device: Kobo
Quote:
I then tried to use the Kobo software to add back a book purchased from Kobobooks and the same freeze occured(sic). However the Kobo showed the book I added except for the cover.
Hmmm, this is the first time I've heard of someone having major problems with an official 'KoboBooks' book, especially loaded in through the software. For reference sake, which book was it? Maybe someone else had made the same purchase from Kobo and can provide specific insights.

Quote:
Calibre still shows the books that I had added since getting the Kobo as present on the device.
This is just plain weird... Calibre doesn't have a cache of what books are on the device. It just scans for epub files and reads the metadata (can be disabled) to get the device book list. Can you take a look at the Kobo drive through a file manager and see if the books are still there? (I believe last time I did a factory reset, it didn't actually remove plain epub files I dragged on myself)


Just out of curiosity, when you say "freeze", how long did you wait before resetting? I've loaded on a few books with heavy CSS styles that took over 2-3 minutes to process.
Stinger is offline   Reply With Quote
Old 06-07-2010, 07:57 PM   #14
saskee
Junior Member
saskee began at the beginning.
 
Posts: 6
Karma: 10
Join Date: May 2010
Device: kobo
Ok...the Kobobook was "Great Reset" which had worked fine before the last couple of days, it was in attempting to reload after my own great reset that it wouldn't completely process. Interestingly enough the book shows on the Kobo (without cover), but when I examined the device directory directly I can't see it. Some other books and newspapers that I had added, however do show up on the device drive although they do not show up when trying to access them on the Kobo itself. The device drive also shows a couple of empty folders of books that I had removed. I can view the books that the device can't see using the Adobe software.

Calibre shows some, but not all, books that were there before I used the device reset, but doesn't show the Great Reset which the Kobo does.

As for the time I have left the Kobo "processing" for over 30 minutes and the indicator doohickey didn't move past about 10% completion.

Thanks for your help,
Jim
saskee is offline   Reply With Quote
Old 06-07-2010, 08:31 PM   #15
Stinger
Asha'man
Stinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-booksStinger has learned how to read e-books
 
Stinger's Avatar
 
Posts: 335
Karma: 844
Join Date: May 2010
Location: Canada
Device: Kobo
Quote:
Interestingly enough the book shows on the Kobo (without cover), but when I examined the device directory directly I can't see it.
This is normal. Books you buy from KoboBooks and load onto the device through the official desktop software are injected directly into the SQlite database. (\.kobo\KoboReader.sqlite)

Quote:
Some other books and newspapers that I had added, however do show up on the device drive although they do not show up when trying to access them on the Kobo itself.
I would guess that one of these files is the source of your problems. Delete them. Then re-add them, 1 by 1 until you discover which one is causing problems. There have been a few people that have reported the same freezing/missing books issues you have, and have narrowed it down to corrupt/funky specific books.

Quote:
Calibre shows some, but not all, books that were there before I used the device reset, but doesn't show the Great Reset which the Kobo does.
This is also completely normal. Calibre does not read the contents of the Kobo SQlite database, which, like I mentioned above, is where books loaded through the desktop app are stored.
One of our members here is working on a device driver for Calibre that can handle the SQlite database, and even selectively remove any of the 100 free included books:
http://www.mobileread.com/forums/showthread.php?t=85226

Be warned, it's still in beta testing, so I would make a copy of the SQlite database file (i indicated the path above) before using this driver.

Last edited by Stinger; 06-07-2010 at 08:36 PM.
Stinger is offline   Reply With Quote
Reply

Tags
kobo freeze epub

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Kobo Freezing Liz99 Kobo Reader 10 06-15-2011 11:07 AM
Classic Calibre freezing when transferring epub? itsmattxp Barnes & Noble NOOK 1 09-21-2010 07:51 PM
Issues transferring books to kobo with ADE crash-7 Kobo Reader 4 07-22-2010 09:05 AM
Problem transferring Secure epub to PRS600 SandDanz ePub 3 02-05-2010 08:52 PM
Transferring Sony EPUB via Calibre nadolax Calibre 12 01-10-2010 02:24 PM


All times are GMT -4. The time now is 09:52 AM.


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