Calibre does not accept new books

mmaurente · 02-20-2025, 04:17 PM

When trying to import a new book it says there was a problem adding new files. When I click on show details, it gives this message:

calibre, version 7.26.0
WARNING: Errors adding: There were problems adding some files, click "Show details" for more information

----------------------------------------------------------------------
Failed to add file Q:/Books/730 - Livros Kindle/1984 - George Orwell.epub for the book: 1984
With error:
Traceback (most recent call last):
File "calibre\gui2\add.py", line 488, in add_formats
File "calibre\db\cache.py", line 1989, in add_format
File "calibre\db\tables.py", line 710, in update_fmt
File "calibre\db\backend.py", line 1145, in execute
File "C:\t\t\apsw-42s16m2x\src\cursor.c", line 240, in resetcursor
apsw.CantOpenError: CantOpenError: unable to open database file

Quoth · 02-20-2025, 04:20 PM

Where or what is drive Q?

Also where is your Calibre Library?

JSWolf · 02-20-2025, 05:16 PM

Quote:

Originally Posted by mmaurente

When trying to import a new book it says there was a problem adding new files. When I click on show details, it gives this message:

calibre, version 7.26.0
WARNING: Errors adding: There were problems adding some files, click "Show details" for more information

----------------------------------------------------------------------
Failed to add file Q:/Books/730 - Livros Kindle/1984 - George Orwell.epub for the book: 1984
With error:
Traceback (most recent call last):
File "calibre\gui2\add.py", line 488, in add_formats
File "calibre\db\cache.py", line 1989, in add_format
File "calibre\db\tables.py", line 710, in update_fmt
File "calibre\db\backend.py", line 1145, in execute
File "C:\t\t\apsw-42s16m2x\src\cursor.c", line 240, in resetcursor
apsw.CantOpenError: CantOpenError: unable to open database file

Is your library on a cloud service? Is it being synced to a cloud service? Do you have an AV getting in the way?

mmaurente · 02-20-2025, 05:36 PM

Quote:

Originally Posted by Quoth

Where or what is drive Q?

Also where is your Calibre Library?

Drive Q is a drive I mounted from a NAS. My library is there, in a folder called Caliber.

Karellen · 02-20-2025, 06:26 PM

Quote:

Originally Posted by mmaurente

Drive Q is a drive I mounted from a NAS. My library is there, in a folder called Caliber.

This should explain the problem...
https://manual.calibre-ebook.com/faq...rked-drive-nas

mmaurente · 02-20-2025, 06:49 PM

Quote:

Originally Posted by Karellen

This should explain the problem...
https://manual.calibre-ebook.com/faq...rked-drive-nas

Serious? So I can only have the library in C:?

JSWolf · 02-20-2025, 07:04 PM

Can a calibre library be on a NAS if it's done carefully and you have a drive letter to the library?

mmaurente · 02-20-2025, 07:08 PM

Quote:

Originally Posted by JSWolf

Can a calibre library be on a NAS if it's done carefully and you have a drive letter to the library?

Are you asking? Well, I had a drive letter mounted, as you can see.

JSWolf · 02-20-2025, 07:10 PM

Quote:

Originally Posted by mmaurente

Are you asking? Well, I had a drive letter mounted, as you can see.

Yes, I'm asking. I hope the answer is yes.

mmaurente · 02-20-2025, 07:19 PM

Well, I have a single NAS drive as the letter Q: in Windows. When you say doing carefully does it involve something more than that?

Sirtel · 02-20-2025, 07:19 PM

Quote:

Originally Posted by mmaurente

Serious? So I can only have the library in C:?

Basically yes. No cloud and no networked drive, or there will likely be issues.

JSWolf · 02-20-2025, 07:43 PM

Quote:

Originally Posted by Sirtel

Basically yes. No cloud and no networked drive, or there will likely be issues.

I have my libraries on a networked drive. Not a NAS though. Never had a problem for years. I mean more then 10 years.

I'm wondering if I could move my libraries to a NAS.

Sirtel · 02-20-2025, 07:48 PM

Quote:

Originally Posted by JSWolf

I have my libraries on a networked drive. Not a NAS though. Never had a problem for years. I mean more then 10 years.

I'm wondering if I could move my libraries to a NAS.

Yes, and I have mine in Dropbox.

Lots and lots of people do have issues with both networked drives and cloud, though, as seen in this very thread.

theducks · 02-20-2025, 08:28 PM

Quote:

Originally Posted by mmaurente

Serious? So I can only have the library in C:?

No. Any physically ATTACHED drive.

My main is on U: (a second partition on a really big (when it was added) drive, Magazines is on M: (A USB drive)
2 way sync (of any kind) is a disaster waiting to strike a Calibre Library.
The Filesystem part MUST stay in lockstep with the DB part.

theducks · 02-20-2025, 08:34 PM

My 'Intake' Library is on another PC on my desk.
Years ago I discovered that Calibre became unstable (non-responsive) if I tried to edit metadata from the other (main) PC.
OTOH I found I could do a PULL transfer (Copy to PC) reliably.

YMMV
This is NOT the official policy on network attached.

USE ANY contrary to policy advice AT YOUR OWN RISK.

02-20-2025, 04:17 PM	#1
mmaurente Junior Member Posts: 7 Karma: 10 Join Date: Apr 2019 Device: IPad mini	Calibre does not accept new books When trying to import a new book it says there was a problem adding new files. When I click on show details, it gives this message: calibre, version 7.26.0 WARNING: Errors adding: There were problems adding some files, click "Show details" for more information ---------------------------------------------------------------------- Failed to add file Q:/Books/730 - Livros Kindle/1984 - George Orwell.epub for the book: 1984 With error: Traceback (most recent call last): File "calibre\gui2\add.py", line 488, in add_formats File "calibre\db\cache.py", line 1989, in add_format File "calibre\db\tables.py", line 710, in update_fmt File "calibre\db\backend.py", line 1145, in execute File "C:\t\t\apsw-42s16m2x\src\cursor.c", line 240, in resetcursor apsw.CantOpenError: CantOpenError: unable to open database file

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02-20-2025, 04:20 PM	#2
Quoth Still reading Posts: 15,075 Karma: 111120239 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	Where or what is drive Q? Also where is your Calibre Library?

02-20-2025, 07:04 PM	#7
JSWolf Resident Curmudgeon Posts: 80,874 Karma: 150249631 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Can a calibre library be on a NAS if it's done carefully and you have a drive letter to the library?

02-20-2025, 07:19 PM	#10
mmaurente Junior Member Posts: 7 Karma: 10 Join Date: Apr 2019 Device: IPad mini	Well, I have a single NAS drive as the letter Q: in Windows. When you say doing carefully does it involve something more than that?

02-20-2025, 08:34 PM	#15
theducks Well trained by Cats Posts: 31,273 Karma: 61916422 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	My 'Intake' Library is on another PC on my desk. Years ago I discovered that Calibre became unstable (non-responsive) if I tried to edit metadata from the other (main) PC. OTOH I found I could do a PULL transfer (Copy to PC) reliably. YMMV This is NOT the official policy on network attached. USE ANY contrary to policy advice AT YOUR OWN RISK.

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