Kobo Libra Colour - Error communicating with device

[Evil Overlord]

Calibre 7.22 (latest)
Kobo Touch Extended (latest)
Windows 11

Previously had a Kobo Aura One. No trouble there.
I use Calibre for library management.
I then installed Kobo Touch Extended. Set to convert to kepub on the fly. Still no trouble.
Got a new Kobo Libra Colour. Now, I'm having some trouble.

Trying to transfer my whole library (2,700 books), I get the error below. I'm able to transfer 1 book at a time, 100 books, etc. I'm trying in increments to figure out where the trouble is - if there's just one or more problem books - but thought I'd ask here in the meantime.

calibre, version 7.22.0
ERROR: Error: Error communicating with device

[Errno 2] No such file or directory: 'C:\\Users\\XXX\\AppData\\Local\\Temp\\calibre_97e25o2a\\qebqbnxe_epub_container\\OEBPS\\META-INF\\titlepage.xhtml'

Traceback (most recent call last):
  File "calibre\gui2\device.py", line 112, in run
  File "calibre\gui2\device.py", line 646, in _upload_books
  File "calibre_plugins.kobotouch_extended.device.driver", line 343, in upload_books
  File "calibre\devices\kobo\driver.py", line 2283, in upload_books
  File "calibre_plugins.kobotouch_extended.device.driver", line 177, in _modify_epub
  File "calibre_plugins.kobotouch_extended.container", line 121, in __init__
  File "calibre_plugins.kobotouch_extended.container", line 388, in __run_async_over_content
  File "calibre_plugins.kobotouch_extended.container", line 375, in __run_async
  File "calibre_plugins.kobotouch_extended.container", line 371, in __run_async
  File "concurrent\futures\_base.py", line 449, in result
  File "concurrent\futures\_base.py", line 401, in __get_result
  File "concurrent\futures\thread.py", line 58, in run
  File "calibre_plugins.kobotouch_extended.container", line 287, in forced_cleanup
  File "calibre\ebooks\oeb\polish\container.py", line 624, in raw_data
  File "calibre\ebooks\oeb\polish\container.py", line 1108, in open
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\XXX\\AppData\\Local\\Temp\\calibre_97e25o2a\\qebqbnxe_epub_container\\OEBPS\\META-INF\\titlepage.xhtml'

[DNSB]

That sounds as if something on your computer is interfering with calibre's temp files since it appears that titlepage.xhtml is being deleted. Antivirus/antimalware software is likely the most common suspect.

You could try using msconfig to disable all non-Microsoft services and then restarting to see if the issue persists. If the problem goes away, try adding back the non-Microsoft services in batches until the program re-occurs at which point you know the issue is with the last batch re-enabled. In the image below, you would click on Hide all Microsoft services and then Disable all.

[Evil Overlord]

By loading in batches, I've narrowed this down to a single file. Will investigate in detail tomorrow. Thanks for suggestions.

[DNSB]

If it's one of your epubs, you could try opening the file with either calibre's ebook-editor or Sigil after installing the epubcheck plugin and see what epubcheck has to say about that file.

[Evil Overlord]

Calibre was able to fix all problems automatically, and it then passed epubcheck.

Thanks! I initially assumed this was a communication problem, not a file problem. Glad it was so easily fixed.