MobileRead Forums - View Single Post - calibre 9.6 bug -- unable to restore a library due to access violation of metadata.db

wtx · 04-04-2026, 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"

04-04-2026, 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"