[davidfor]

Originally Posted by ownedbycats

calibre, version 5.14.0
ERROR: Unhandled exception: <b>ValueError</b>:Not a ZIP file

calibre 5.14* [64bit]  embedded-python: True is64bit: True
Windows-10-10.0.19041 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19041')
Python 3.8.5
Windows: ('10', '10.0.19041', '', 'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: DeDRM (7, 2, 1) && Action Chains (1, 7, 2) && Audit Log (1, 0, 16) && Barnes & Noble (1, 2, 16) && Calibre Power Search Plugin (2, 0, 0) && Comments Cleaner (1, 3, 2) && Count Pages (1, 11, 0) && Embed Comic Metadata (1, 6, 1) && EpubCheck (0, 2, 3) && EpubMerge (2, 11, 0) && Extract ISBN (1, 5, 0) && FanFicFare (4, 1, 0) && Fantastic Fiction (1, 4, 0) && Favourites Menu (1, 0, 5) && Find Duplicates (1, 8, 5) && Generate Cover (2, 0, 2) && GetFileName (0, 1, 1) && Goodreads (1, 5, 1) && Import List (1, 5, 4) && Job Spy (1, 0, 190) && Kindle hi-res covers (0, 5, 0) && Kobo Books (1, 8, 2) && Kobo Utilities (2, 13, 2) && KoboTouchExtended (3, 4, 4) && Library Codes (1, 0, 50) && Manage Series (1, 2, 11) && Modify ePub (1, 6, 2) && Obok DeDRM (7, 2, 1) && Open With (1, 5, 13) && Quality Check (1, 11, 2) && Reading List (1, 7, 6) && Search The Internet (1, 8, 1) && SmartEject (2, 3, 0) && Standard Ebooks (1, 0, 0) && Sum Column (0, 3, 1) && View Manager (1, 6, 0) && Walk Search History (1, 3, 2)
Traceback (most recent call last):
  File "D:\Documents\git\calibre\src\calibre\ebooks\oeb\polish\container.py", line 1183, in __init__
  File "D:\Documents\git\calibre\src\calibre\utils\zipfile.py", line 775, in __init__
  File "D:\Documents\git\calibre\src\calibre\utils\zipfile.py", line 810, in _GetContents
  File "D:\Documents\git\calibre\src\calibre\utils\zipfile.py", line 825, in _RealGetContents
calibre.utils.zipfile.BadZipfile: File is not a zip file

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre_plugins.koboutilities.action", line 5310, in update_book_toc_on_device
  File "calibre_plugins.koboutilities.action", line 5483, in _get_chapter_status
  File "calibre_plugins.koboutilities.action", line 5399, in _get_chapter_list
  File "calibre_plugins.koboutilities.action", line 5341, in load_ebook
  File "D:\Documents\git\calibre\src\calibre\ebooks\oeb\polish\container.py", line 1190, in __init__
  File "D:\Documents\git\calibre\src\calibre\utils\localunzip.py", line 253, in extractall
  File "D:\Documents\git\calibre\src\calibre\utils\localunzip.py", line 240, in _extractall
ValueError: Not a ZIP file

I got this error while updating the TOC for a handful of fics. Any idea what's going on?

The error didn't reoccur when I tried again and when I put the three books into epub-checker there were only some minor errors about html attributes.

EDIT: Actually, I suspect it might be because I tried to run it before the book had completely finished sending to device.

That would be it. The error is that the book file is not a valid zip file, and if it was in the midst of being copied, to the device, it could cause something like that. I have been thinking of adding a check to see if there were any device jobs in the queue before running this. Your error proves that it is needed And it should have been on a few of the other functions as well.

Are you having any other issues with this? Any suggestions for improvements?