error 21

lbutlr · 04-14-2017, 12:30 PM

When trying to add a book to my library I get the following error overtime, regardless of how I try to add the book (drag and drop or "add Book"

I have disabled all plugins and cleaned the library (no errors, no duplicates). I've also tried a few different pub files with mixed results, some import fine, others generate this error. I cannot see any difference in the files and they are not DRMed.

Not sure if it matters, but Calibre is often using 90-105% of a CPU core (2012 iMac), then drops to 0.5%

macOS Sierra, Calibre 2.82

Code:

calibre, version 2.82.0
WARNING: Errors while adding: There were problems adding some files, click "Show details" for more information


----------------------------------------------------------------------
Failed to add the file /Users/lbutlr/Desktop/Pilot X.epub to the book: /Users/lbutlr/Desktop/Pilot X.epub
With error:
Traceback (most recent call last):
  File "site-packages/calibre/gui2/add.py", line 410, in add_formats
  File "site-packages/calibre/db/cache.py", line 1385, in add_format
  File "site-packages/calibre/startup.py", line 122, in local_open
IOError: [Errno 21] Is a directory: u'/Users/lbutlr/Desktop/Pilot X.epub'

higgs · 04-14-2017, 12:40 PM

Same error here and an explanation from Kovid.

https://www.mobileread.com/forums/sh...ighlight=errno

kovidgoyal · 04-14-2017, 12:41 PM

That's because the "books" you are adding are not epub files, but directories whose names happen to have the .epub extension. These are not supported. You need to get hold of actual epub files before you can add them to calibre.

lbutlr · 04-18-2017, 05:59 AM

Quote:

Originally Posted by kovidgoyal

That's because the "books" you are adding are not epub files, but directories whose names happen to have the .epub extension. These are not supported. You need to get hold of actual epub files before you can add them to calibre.

Thanks. I didn't realize it was a bundle directory instead of a regular epub. I guess iBooks deflates the epub files.

I used this command to reconstruct the epub

Code:

cd /path/to/my/book.epub/
zip -rX ../book.epub mimetype META-INF/ OEBPS/ *

04-14-2017, 12:30 PM	#1
lbutlr Enthusiast Posts: 31 Karma: 103134 Join Date: Feb 2010 Device: iPhone	error 21 When trying to add a book to my library I get the following error overtime, regardless of how I try to add the book (drag and drop or "add Book" I have disabled all plugins and cleaned the library (no errors, no duplicates). I've also tried a few different pub files with mixed results, some import fine, others generate this error. I cannot see any difference in the files and they are not DRMed. Not sure if it matters, but Calibre is often using 90-105% of a CPU core (2012 iMac), then drops to 0.5% macOS Sierra, Calibre 2.82 Code: calibre, version 2.82.0 WARNING: Errors while adding: There were problems adding some files, click "Show details" for more information ---------------------------------------------------------------------- Failed to add the file /Users/lbutlr/Desktop/Pilot X.epub to the book: /Users/lbutlr/Desktop/Pilot X.epub With error: Traceback (most recent call last): File "site-packages/calibre/gui2/add.py", line 410, in add_formats File "site-packages/calibre/db/cache.py", line 1385, in add_format File "site-packages/calibre/startup.py", line 122, in local_open IOError: [Errno 21] Is a directory: u'/Users/lbutlr/Desktop/Pilot X.epub'

04-14-2017, 12:40 PM	#2
higgs Connoisseur Posts: 77 Karma: 149999 Join Date: Aug 2008 Location: Ireland Device: Kobo Glo, Kobo Touch, Kindle PW3	Same error here and an explanation from Kovid. https://www.mobileread.com/forums/sh...ighlight=errno Last edited by higgs; 04-14-2017 at 12:40 PM. Reason: forgot link

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04-14-2017, 12:41 PM	#3
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That's because the "books" you are adding are not epub files, but directories whose names happen to have the .epub extension. These are not supported. You need to get hold of actual epub files before you can add them to calibre.