"Corrupted Database" Error after update to 3.28.0

[Cook1e]

Hi, I hope this is the right place to post. Calibre was working fine until I updated, following which I receive a "corrupted database" error and an option to rebuild the database (screenshots attached), which I tried and failed with the following error:

calibre, version 3.28.0
ERROR: Failed to repair library: Restoring database failed, click Show details to see details

Traceback (most recent call last):
File "site-packages\calibre\db\restore.py", line 123, in run
File "site-packages\calibre\db\restore.py", line 239, in create_cc_metadata
File "site-packages\calibre\db\restore.py", line 29, in __init__
File "site-packages\calibre\db\backend.py", line 377, in __init__
File "site-packages\calibre\db\backend.py", line 1121, in fget
File "site-packages\calibre\db\backend.py", line 834, in conn
File "site-packages\calibre\db\backend.py", line 267, in __init__
CantOpenError: CantOpenError: unable to open database file


I restored the "Calibre Library" directory from my own backup, but the error persists.

Can anyone help? I really don't want to lose my book collection!

TIA

[kovidgoyal]

Something on your computer is blocking calibre from accessing its database. Most likely your antivirus. Exclude the calibre library folder from your antivirus and/or disable the antivirus and you should be fine.

[Cook1e]

Hi Kovid,
Many thanks for instant reply! I don't think that is the case, though I'll check.

I have just uninstalled 3.28.0 and installed 3.27.1 and it works fine (which is a relief!). I'll try 3.28.0 again, check the antivirus (I have Malwarebytes, Bitdefender & Glasswire) and let you know.

[Cook1e]

Hi again Kovid - you were correct - Bitdefender was blocking access to "protected folders". 3.28.0 is now working fine. Many thanks for the tip and speedy response!