calibre 9.6 bug -- unable to restore a library due to access violation of metadata.db

wtx · Yesterday, 11:03 AM

I was currently trying calibre version 9.6 on Windows: First, I got the message that my library was corrupt. Followed, after a library restore attempt, with the message that the library could not have been restored due to an access violation of metadata.db. However, process explorer showed that this file was actually already opened by calibre.exe and was thus unavailable to the external python script. The solution (for a calibre library at "P:\Apps\Calibre\Library"):

(1) Close all "Calibre" processes

(2) Open Windows explorer and select the program root path (e.g. "C:\Program Files\Calibre2")

(3) Open a terminal window within this folder (e.g. via "cmd.exe")

(4) Execute: calibredb restore_database --really-do-it --with-library "P:\Apps\Calibre\Library"

JSWolf · Yesterday, 11:05 AM

You don't need to open a terminal to do a restore. You can easily do it from the GUI.

theducks · Yesterday, 11:12 AM

And where is P:
I suspect it is not a 100% local attached drive.
https://manual.calibre-ebook.com/faq...rked-drive-nas

Yesterday, 11:03 AM	#1
wtx Junior Member Posts: 1 Karma: 10 Join Date: Apr 2026 Device: Boox Go7	calibre 9.6 bug -- unable to restore a library due to access violation of metadata.db I was currently trying calibre version 9.6 on Windows: First, I got the message that my library was corrupt. Followed, after a library restore attempt, with the message that the library could not have been restored due to an access violation of metadata.db. However, process explorer showed that this file was actually already opened by calibre.exe and was thus unavailable to the external python script. The solution (for a calibre library at "P:\Apps\Calibre\Library"): (1) Close all "Calibre" processes (2) Open Windows explorer and select the program root path (e.g. "C:\Program Files\Calibre2") (3) Open a terminal window within this folder (e.g. via "cmd.exe") (4) Execute: calibredb restore_database --really-do-it --with-library "P:\Apps\Calibre\Library"

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Yesterday, 11:05 AM	#2
JSWolf Resident Curmudgeon Posts: 82,759 Karma: 152504945 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	You don't need to open a terminal to do a restore. You can easily do it from the GUI.

Yesterday, 11:12 AM	#3
theducks Well trained by Cats Posts: 31,664 Karma: 64144480 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	And where is P: I suspect it is not a 100% local attached drive. https://manual.calibre-ebook.com/faq...rked-drive-nas

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