Errors reading books from Archive.org

C Alberga · 12-23-2017, 08:37 PM

I have download some books from archive.org, for example the epub and kindle versions from

https://archive.org/details/lyellstravelsinn00lyell

The Calibre reader gives errors on both formats:

calibre, version 2.42.0
ERROR: Could not open ebook: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf)

Traceback (most recent call last):
File "site-packages\calibre\gui2\viewer\main.py", line 37, in run
File "threading.py", line 763, in run
File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 100, in __enter__
File "site-packages\calibre\customize\conversion.py", line 241, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 209, in convert
ValueError: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf)

for the epub, and:

error: unpack requires a string argument of length 6
Failed to render document
Detailed traceback:
Traceback (most recent call last):
File "site-packages\calibre\gui2\lrf_renderer\main.py", line 33, in run
File "site-packages\calibre\ebooks\lrf\lrfparser.py", line 21, in __init__
File "site-packages\calibre\ebooks\lrf\meta.py", line 483, in __init__
File "site-packages\calibre\ebooks\lrf\meta.py", line 98, in __get__
File "site-packages\calibre\ebooks\lrf\meta.py", line 353, in restore_pos
File "site-packages\calibre\ebooks\lrf\meta.py", line 515, in unpack
error: unpack requires a string argument of length 6

for the mobi.

Is this a known problem (I couldn't find anything in the forum) and is there a fix for it?

Divingduck · 12-24-2017, 04:11 AM

This EPUP isn't perfect but it opens with actual ADE and calibre Viewer and Editor (version 3.14).
Updating calibre will maybe fix your problem. Your version is from October 2015.

C Alberga · 12-27-2017, 10:21 PM

Actually, my installed Calibre is up-to-date, but it is possible that the version of the e-reader that is called when I "open" an .epub file is a left-over from earlier times.

Seems I was one version behind and updated to 3.14. However, version 3.14 of the e-reader still gives the same errors. Not sure where to go next.

kovidgoyal · 12-27-2017, 10:32 PM

According to the error message you posted you are using calibre version 2.42.0

C Alberga · 12-28-2017, 07:21 AM

Yes, at first, because I had associated the reader with .epub before the 64 bit version arrived, and had not uninstalled that. However, as I said in my reply, the latest version also fails for me.;

calibre, version 3.14.0
ERROR: Could not open e-book: Failed to read book, D:\Calibre work\To load\travelsinnortham02lyel_1.epub click "Show Details" for more information

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 284, in main
File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 64, in extract_book
File "site-packages\calibre\customize\conversion.py", line 245, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 259, in convert
ValueError: D:\Calibre work\To load\travelsinnortham02lyel_1.epub is not a valid EPUB file (could not find opf)

So the problem persists.

kovidgoyal · 12-28-2017, 08:45 AM

That book opens fine for me in calibre 3.14

C Alberga · 12-28-2017, 10:36 AM

I guess it just doesn't love me:

calibre, version 3.14.0
ERROR: Could not open e-book: Failed to read book, D:\Calibre work\To load\lyellstravelsinn00lyell.epub click "Show Details" for more information

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 284, in main
File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 64, in extract_book
File "site-packages\calibre\customize\conversion.py", line 245, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 259, in convert
ValueError: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf)

(I've actually downloaded this three times, in case of data loss, but none work.

JSWolf · 12-28-2017, 10:44 AM

Works for me as well.

C Alberga · 12-28-2017, 11:00 AM

Could one of you successful people e-mail the copy which is readable so I can see if it is the copy I have which is bad, or something about my machine? Please, send to:

Cyril at Alberga dot net

BetterRed · 12-28-2017, 03:02 PM

Quote:

Originally Posted by C Alberga

Could one of you successful people e-mail the copy which is readable so I can see if it is the copy I have which is bad, or something about my machine? Please, send to:

Cyril at Alberga dot net

I've uploaded it to media fire, and sent url via PM here.

I suggest you make sure you can open it in Windows via C:\Program Files\Calibre2\ebook-viewer.exe before adding it into a calibre library.

BR

C Alberga · 12-28-2017, 03:22 PM

Huzzah!

That I can read. Now if I can figure out why my downloads were all damaged I'll look for the second trip too.

Thank you, though it still hasn't cleared up the mystery.

JSWolf · 12-28-2017, 03:28 PM

If you are using Internet Explorer, then use Firefox instead.

BetterRed · 12-28-2017, 03:45 PM

FWIW - I used Free Download Manager to download it from archive.org, and Edge to upload to MF using their upload overlay 'gadget'.

12-23-2017, 08:37 PM	#1
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	Errors reading books from Archive.org I have download some books from archive.org, for example the epub and kindle versions from https://archive.org/details/lyellstravelsinn00lyell The Calibre reader gives errors on both formats: calibre, version 2.42.0 ERROR: Could not open ebook: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf) Traceback (most recent call last): File "site-packages\calibre\gui2\viewer\main.py", line 37, in run File "threading.py", line 763, in run File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 100, in __enter__ File "site-packages\calibre\customize\conversion.py", line 241, in __call__ File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 209, in convert ValueError: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf) for the epub, and: error: unpack requires a string argument of length 6 Failed to render document Detailed traceback: Traceback (most recent call last): File "site-packages\calibre\gui2\lrf_renderer\main.py", line 33, in run File "site-packages\calibre\ebooks\lrf\lrfparser.py", line 21, in __init__ File "site-packages\calibre\ebooks\lrf\meta.py", line 483, in __init__ File "site-packages\calibre\ebooks\lrf\meta.py", line 98, in __get__ File "site-packages\calibre\ebooks\lrf\meta.py", line 353, in restore_pos File "site-packages\calibre\ebooks\lrf\meta.py", line 515, in unpack error: unpack requires a string argument of length 6 for the mobi. Is this a known problem (I couldn't find anything in the forum) and is there a fix for it? Last edited by C Alberga; 12-23-2017 at 08:39 PM.

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12-24-2017, 04:11 AM	#2
Divingduck Wizard Posts: 1,161 Karma: 1404241 Join Date: Nov 2010 Location: Germany Device: Sony PRS-650	This EPUP isn't perfect but it opens with actual ADE and calibre Viewer and Editor (version 3.14). Updating calibre will maybe fix your problem. Your version is from October 2015.

12-27-2017, 10:21 PM	#3
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	Actually, my installed Calibre is up-to-date, but it is possible that the version of the e-reader that is called when I "open" an .epub file is a left-over from earlier times. Seems I was one version behind and updated to 3.14. However, version 3.14 of the e-reader still gives the same errors. Not sure where to go next.

12-27-2017, 10:32 PM	#4
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	According to the error message you posted you are using calibre version 2.42.0

12-28-2017, 07:21 AM	#5
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	Yes, at first, because I had associated the reader with .epub before the 64 bit version arrived, and had not uninstalled that. However, as I said in my reply, the latest version also fails for me.; calibre, version 3.14.0 ERROR: Could not open e-book: Failed to read book, D:\Calibre work\To load\travelsinnortham02lyel_1.epub click "Show Details" for more information Traceback (most recent call last): File "site-packages\calibre\utils\ipc\simple_worker.py", line 284, in main File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 64, in extract_book File "site-packages\calibre\customize\conversion.py", line 245, in __call__ File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 259, in convert ValueError: D:\Calibre work\To load\travelsinnortham02lyel_1.epub is not a valid EPUB file (could not find opf) So the problem persists.

12-28-2017, 08:45 AM	#6
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That book opens fine for me in calibre 3.14

12-28-2017, 10:36 AM	#7
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	I guess it just doesn't love me: calibre, version 3.14.0 ERROR: Could not open e-book: Failed to read book, D:\Calibre work\To load\lyellstravelsinn00lyell.epub click "Show Details" for more information Traceback (most recent call last): File "site-packages\calibre\utils\ipc\simple_worker.py", line 284, in main File "site-packages\calibre\ebooks\oeb\iterator\book.py", line 64, in extract_book File "site-packages\calibre\customize\conversion.py", line 245, in __call__ File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 259, in convert ValueError: D:\Calibre work\To load\lyellstravelsinn00lyell.epub is not a valid EPUB file (could not find opf) (I've actually downloaded this three times, in case of data loss, but none work.

12-28-2017, 10:44 AM	#8
JSWolf Resident Curmudgeon Posts: 74,027 Karma: 129333114 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Works for me as well.

12-28-2017, 11:00 AM	#9
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	Could one of you successful people e-mail the copy which is readable so I can see if it is the copy I have which is bad, or something about my machine? Please, send to: Cyril at Alberga dot net

12-28-2017, 03:22 PM	#11
C Alberga Enthusiast Posts: 38 Karma: 10 Join Date: Jul 2012 Device: none	Huzzah! That I can read. Now if I can figure out why my downloads were all damaged I'll look for the second trip too. Thank you, though it still hasn't cleared up the mystery.

12-28-2017, 03:28 PM	#12
JSWolf Resident Curmudgeon Posts: 74,027 Karma: 129333114 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	If you are using Internet Explorer, then use Firefox instead.

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12-28-2017, 03:45 PM	#13
BetterRed null operator (he/him) Posts: 20,579 Karma: 26954694 Join Date: Mar 2012 Location: Sydney Australia Device: none	FWIW - I used Free Download Manager to download it from archive.org, and Edge to upload to MF using their upload overlay 'gadget'.