Calibre 2.21 problem

[Medieval Guy]

Just installed the new update, and get the following error:

calibre, version 2.21.0
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 245, in initialize_db_stage2
File "site-packages\calibre\gui2\main.py", line 182, in start_gui
File "site-packages\calibre\gui2\ui.py", line 362, in initialize
File "site-packages\calibre\gui2\tag_browser\ui.py", line 33, in init_tag_browser_mixin
File "site-packages\calibre\gui2\tag_browser\view.py", line 181, in set_database
File "site-packages\calibre\gui2\tag_browser\model.py", line 282, in set_database
File "site-packages\calibre\db\backend.py", line 126, in set
File "site-packages\calibre\db\backend.py", line 115, in __setitem__
File "site-packages\calibre\db\backend.py", line 804, in execute
File "c:\cygwin64\home\kovid\sw\build\apsw-3.8.2-r1\src\cursor.c", line 231, in resetcursor
CorruptError: CorruptError: database disk image is malformed

[kovidgoyal]

I doubt this has anything to do with 2.21, it indicates your calibre library database is corrupted. CLose calibre, open the calibre library folder, delete metadata.db, now start calibre, the list of books will be blank. Right click the calibre icon in the calibre toolbar and select Library maintenance->Restore database. calibre will automatically rebuild metadata.db.

[Medieval Guy]

That did it, thanks.

I did have to manually delete and re-add a number of books...i.e., move the files out of the Calibre library directory and then add them back in through Calibre. Not sure why that was necessary..?

[theducks]

Originally Posted by Medieval Guy

That did it, thanks.

I did have to manually delete and re-add a number of books...i.e., move the files out of the Calibre library directory and then add them back in through Calibre. Not sure why that was necessary..?

Lost (orphaned) folder entries are usually the result of something going wrong;
Something in the OS blocked the deletion (left over after a rename. You should discover a 'duplicate' of this book)
Cloud sync while library in use
Multiple simultaneous access
The user was messing with that file(name) via the OS
Single Access, but with multiple OS (eg Linux and Win XP )

[chaley]

Originally Posted by Medieval Guy

That did it, thanks.

I did have to manually delete and re-add a number of books...i.e., move the files out of the Calibre library directory and then add them back in through Calibre. Not sure why that was necessary..?

And the big one: having your calibre library on a NAS or network drive.

[tbullock]

I have the same problem as Medieval Guy, but my line numbers are mostly different.

I am trying Kovid Goyal's suggestions to remove the errors. Will reply after attempt to fix.

[BetterRed]

Originally Posted by tbullock

I have the same problem as Medieval Guy, but my line numbers are mostly different.

I am trying Kovid Goyal's suggestions to remove the errors. Will reply after attempt to fix.

@tbullock - In the error trace Medieval Guy posted, the most important line is the last one:

CorruptError: CorruptError: database disk image is malformed

If you're getting a different message there, then then you probably don't have the same problem. And if that's true then it would be preferable to create your own thread and post the complete error trace.

BR