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Old 04-03-2012, 11:05 AM   #1
laxarus
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Problem
Sometimes when i am closing the calibre i get an error like this:

calibre, version 0.8.45
HATA: Unhandled exception: <b>DatabaseException</b>:database is locked
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 271, in run
OperationalError: database is locked

Traceback (most recent call last):
File "site-packages\calibre\gui2\ui.py", line 745, in closeEvent
File "site-packages\calibre\gui2\ui.py", line 654, in write_settings
File "site-packages\calibre\gui2\init.py", line 288, in save_layout_state
File "site-packages\calibre\gui2\library\views.py", line 354, in save_state
File "site-packages\calibre\gui2\library\views.py", line 348, in write_state
File "site-packages\calibre\library\prefs.py", line 58, in set
File "site-packages\calibre\library\prefs.py", line 53, in __setitem__
File "site-packages\calibre\library\sqlite.py", line 314, in run
DatabaseException: database is locked
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 271, in run
OperationalError: database is locked

Any help here?
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Old 04-03-2012, 11:06 AM   #2
JSWolf
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Sounds like something has the database in use. Give the computer a reboot and try again.
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Old 04-03-2012, 03:14 PM   #3
laxarus
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that might actually be the problem since my pc is on like 1 month without restart
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Old 04-03-2012, 07:09 PM   #4
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Did the reboot solve the problem?
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Old 04-03-2012, 07:49 PM   #5
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Lack of use won't lock the DB.

Having an orphaned Calibre session, might do it.

Backup software, backing up the DB might temporarily lock the file.
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Old 04-04-2012, 04:56 AM   #6
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Dropbox or an over-ambitious anti-virus tool also might do it.
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Old 04-06-2012, 07:41 AM   #7
laxarus
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Quote:
Originally Posted by JSWolf View Post
Did the reboot solve the problem?
Actually it did not.

Time to time i get the same error when closing the calibre. And the next start of calibre after getting this error seems to be way longer.

I dont know how it might be related to the problem but i want to give this info.I got nearly 3k books on my library and the calibre library location is on my external hard drive. I believe these conditions only affect the loading time, not supposed to give me an error.
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Old 04-06-2012, 10:03 PM   #8
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Sometimes happens to me when I detach the external drive with my library when is calibre open. Even if I reattach the drive before closing or using calibre. It a Windows thing in my case I think.

A flakey cable or power supply or turning off the drive can also cause this.

Helen
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Old 04-11-2012, 07:05 PM   #9
laxarus
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well, this is getting out of control. The load time of calibre slowed down considerably and i get that error more frequently. I m sure there is no problem with the external drive and the power cables. I set the external driver options to prevent it to go to sleep mode but that didnt solve the issue. Tried reinstalling the calibre, still no luck. Also, after shutting down the calibre with this error, it takes a lot of time for calibre to load.
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Old 04-12-2012, 01:07 AM   #10
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Perhaps temporarily move your library to internal hard drive to see if the problem persists.
Also try different USB port. Sleep shouldn't matter unless you get the drive pop up window or the Windows device connected tone.
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