Kobo Libra Colour doesn't connect with Calibre

[Retromantic]

Hello everyone.

Apologies for posting this, as I can see a lot of similar historic posts, but none of them seem to come to a conclusion and perhaps my situation might shed more light on the issue?

I had a Kobo Libra Colour last year and repeatedly had trouble with it connecting to Calibre on macOS. I followed all the advice, made sure I ejected properly etc etc, but despite this, every few times I tried to connect the two together it would result in me having to restore my database on the Kobo and lose everything - before starting again.

That Kobo was stolen, and I have now replaced it with a new one, but the same model. The problem persists, and this time I can be 100% sure the Kobo was fresh out of the box and updated fully. The initial sync worked, and then subsequent connections result in the 'Error communicating with device' error.

Here's the more detailed error info:

calibre, version 8.16.2
ERROR: Error: Error communicating with device

database disk image is malformed

Traceback (most recent call last):
  File "calibre/devices/kobo/driver.py", line 2075, in books
  File "src/cursor.c", line 189, in resetcursor
apsw.CorruptError: database disk image is malformed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre/gui2/device.py", line 110, in run
  File "calibre/gui2/device.py", line 581, in _books
  File "calibre/devices/kobo/driver.py", line 1992, in books
  File "calibre/devices/kobo/db.py", line 94, in __exit__
apsw.CorruptError: database disk image is malformed

So, I think I can rule out the device itself. I also have a new Mac since, so I can rule out the computer. Is there anything else I can do or am I just doomed to have to scorch the Earth each time I want to update the books on my device?

[JSWolf]

It is your Kobo that's the problem. The database on your Kobo is corrupt and needs to be fixed. What you need to do is log out of your Kobo and then log back in so the database can be rebuilt. You will be starting over.

What you should do from here on is setup the Kobo Utilities plugin to backup your database when you connect to your library in calibre. And also use Kobo Utilities to keep track of your reading positions so you can restore them should you ever need to restore the database.

To log out...
Home Screen > More > Settings > Accounts > Sign Out

Did you pull out the USB cable without properly ejecting from the computer?

[fogice]

I can't give any advice beyond what JSWolf said. I can say that I use Calibre on a Mac successfully with a Libra 2 and a Clara BW, only to show that it isn't a universal problem.

[kovidgoyal]

https://manual.calibre-ebook.com/faq...-touch-glo-etc