Calibre 2.21 problem

[tbullock]

I want to follow Better Read's suggestion to post a thread of my own, but I am not sure how to do that. Can a moderator split what follows into its own thread and send me a link to it so I know where to find it?

Originally Posted by Better Red

@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.

REsults I got when opening Calibre 2.21:
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 414, in initialize
File "site-packages\calibre\gui2\init.py", line 582, in save_layout_state
File "site-packages\calibre\gui2\library\views.py", line 498, in save_state
File "site-packages\calibre\gui2\library\views.py", line 492, in write_state
File "site-packages\calibre\db\backend.py", line 126, in set
File "site-packages\calibre\db\backend.py", line 122, 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
CantOpenError: CantOpenError: unable to open database file
End End of errors

following Kovid's advice I implemented the steps he suggested and I opened 2.21 successfully; however all my categories said zero books. that means i have to use Calibre to rebuild my library from my backup.

Does anyone know of traps and errors to avoid when adding books back from backup? I suppose the add-back is by each book and not a group of books for the same author?

All experience shared will be much appreciated. Thank you !!!

Almost-Retired!

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Done - there's a New Thread (too small) button at top left of each (sub) forum (below Stickies)

BR