Error message when launching Calibre

[Ubiquity]

Hello, all of a sudden I'm getting error message when Calibre starts. Does anybody know what's going on and how to solve the issue? Thank you.

calibre, version 3.44.0
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click Show details to learn more.

Traceback (most recent call last):
  File "site-packages\calibre\gui2\main.py", line 291, in initialize_db_stage2
  File "site-packages\calibre\gui2\main.py", line 235, in start_gui
  File "site-packages\calibre\gui2\ui.py", line 436, in initialize
  File "site-packages\calibre\gui2\init.py", line 780, in save_layout_state
  File "site-packages\calibre\gui2\library\views.py", line 635, in save_state
  File "site-packages\calibre\gui2\library\views.py", line 629, in write_state
  File "site-packages\calibre\db\cache.py", line 62, in call_func_with_lock
  File "site-packages\calibre\db\cache.py", line 616, in set_pref
  File "site-packages\calibre\db\backend.py", line 134, in set
  File "site-packages\calibre\db\backend.py", line 131, in __setitem__
SQLError: SQLError: no such savepoint: _apsw-0

Btw. repairing installation doesnot help, when launching operations like ebook conversion or download news sources, Calibre silently closes
I have also tried to change the library if that's not due to corrupted metadata database, getting same error anyway.

[kovidgoyal]

Something is interfering with calibre when it tries to access the database. Try excluding your calibre library folder from the anti-virus software.

[Ubiquity]

Solved, it was disk full. Weird that Calibre indicates insufficience of space this way.

[Oddball]

Originally Posted by Ubiquity

Solved, it was disk full. Weird that Calibre indicates insufficience of space this way.

Thank you for posting this. Now I will know what i will get once i fill the 2TB drive i have the library on!