Error message - adding books

[Squash0001]

hi,

while trying to add new books to updated calibre library, get the following message, which to me does not make a lot of sense.

Traceback (most recent call last):
File "site-packages/calibre/gui2/add.py", line 366, in add_book
File "site-packages/calibre/db/legacy.py", line 211, in create_book_entry
File "site-packages/calibre/db/cache.py", line 57, in call_func_with_lock
File "site-packages/calibre/db/cache.py", line 1471, in create_book_entry
File "site-packages/calibre/db/backend.py", line 793, in execute
File "src/cursor.c", line 231, in resetcursor
CantOpenError: CantOpenError: unable to open database file

I get this error for every book I try and add,

What am I doing wrong, what can I do to remedy, if at all possible.

Grateful for any insight anybody may have.

- Working on a Mac, with updated OS and Calibre 2.17 -,

Thx

[kovidgoyal]

That's an error trying to open the calibre database, this typically happens if you place the calibre library in a networked location or an malfunctioning disk or some such.

[Squash0001]

dear kovid,

thanks for yr reply.

the database is ON my mac, not networked.

if I e.g. double click on a book on the database, I do get a similar message, shorter in text, around 'not being able to open the database', but this then disappears, and the book nicely opens.

is it possible that it has to do with the size of the database, it is pretty large.
and what can I do to eliminate this error and malfunctioning?

thanks in advance,

squash

[kovidgoyal]

Run a disk check, check the permissions on the metadata.db file and the library folder.