Lost Library Access on NAS

was698002 · 12-30-2025, 11:13 AM

I know NAS storage is discouraged but I have been doing it since Windows XP as the only person on my NAS and it has worked well. All of a sudden I can't see my library on Calibre with Win 11 although I was able to last week. Looks fine on File Explorer and can even see .caltrash (which seems to be empty including sub folders)

calibre, version 8.15.0
ERROR: Unhandled exception: <b>PermissionError</b>:[WinError 5] Access is denied: '\\\\PALIMPSEST\\Cloud_Nein\\Calibre Library2\\.caltrash'

calibre 8.15 embedded-python: True
Windows-10-10.0.26200-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26200')
Python 3.11.14
Windows: ('10', '10.0.26200', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9) && Standard Ebooks (1, 0, 0)
Traceback (most recent call last):
File "calibre\startup.py", line 63, in slot
File "calibre\gui2\actions\choose_library.py", line 332, in <lambda>
File "calibre\gui2\actions\choose_library.py", line 773, in switch_requested
File "calibre\gui2\ui.py", line 974, in library_moved
File "calibre\db\legacy.py", line 191, in __init__
File "calibre\db\legacy.py", line 45, in create_backend
File "calibre\db\backend.py", line 548, in __init__
File "calibre\db\backend.py", line 2215, in ensure_trash_dir
PermissionError: [WinError 5] Access is denied: '\\\\PALIMPSEST\\Cloud_Nein\\Calibre Library2\\.caltrash'

Is this due to a Win 11 update? Is the problem with .caltrash?

theducks · 12-30-2025, 12:53 PM

Make sure the that folder has the same rights as the rest in the Library.

But, you really are taking a risk with a WORKING Library on the network. It is not all just about multiple access issues.

BetterRed · 12-30-2025, 05:37 PM

Try running calibre in Windows safe mode.

If calibre works there then it's highly likely that a 3rd party program that's run at startup is generating the error.

And I have lost count of posts that contain the statement "…it (calibre on network storage) has been working for years until now…"

BR

was698002 · Yesterday, 01:52 PM

Vituperation unhelpful, solution follows-
Problem caused by unfathomable entanglement of Win 11 user and group permissions with inheritance applied to linux filesystem in NAS. So-
Create Library3
Robocopy Library2 to 3 without permissiohns (default)
Verify copy with winmerge
Delete Library2
Rename Library3 Library2
Bob's your uncle

DNSB · Yesterday, 07:02 PM

I didn't see any vituperation. OTOH, I agree that using SQLite on a database on a network connected drive is an unnecessary risk. The creators of SQLite do not recommend it, the author of calibre does not recommend it and the users here have posted too often about running into issues with having their calibre library on a network connected drive.

As @BetterRed said, most of those message do include that the user has done this for years before bad things happened.

12-30-2025, 11:13 AM	#1
was698002 Junior Member Posts: 2 Karma: 10 Join Date: Dec 2025 Device: phone	Lost Library Access on NAS I know NAS storage is discouraged but I have been doing it since Windows XP as the only person on my NAS and it has worked well. All of a sudden I can't see my library on Calibre with Win 11 although I was able to last week. Looks fine on File Explorer and can even see .caltrash (which seems to be empty including sub folders) calibre, version 8.15.0 ERROR: Unhandled exception: <b>PermissionError</b>:[WinError 5] Access is denied: '\\\\PALIMPSEST\\Cloud_Nein\\Calibre Library2\\.caltrash' calibre 8.15 embedded-python: True Windows-10-10.0.26200-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.26200') Python 3.11.14 Windows: ('10', '10.0.26200', 'SP0', 'Multiprocessor Free') Interface language: None EXE path: C:\Program Files\Calibre2\calibre.exe Successfully initialized third party plugins: DeDRM (10, 0, 9) && Standard Ebooks (1, 0, 0) Traceback (most recent call last): File "calibre\startup.py", line 63, in slot File "calibre\gui2\actions\choose_library.py", line 332, in <lambda> File "calibre\gui2\actions\choose_library.py", line 773, in switch_requested File "calibre\gui2\ui.py", line 974, in library_moved File "calibre\db\legacy.py", line 191, in __init__ File "calibre\db\legacy.py", line 45, in create_backend File "calibre\db\backend.py", line 548, in __init__ File "calibre\db\backend.py", line 2215, in ensure_trash_dir PermissionError: [WinError 5] Access is denied: '\\\\PALIMPSEST\\Cloud_Nein\\Calibre Library2\\.caltrash' Is this due to a Win 11 update? Is the problem with .caltrash?

12-30-2025, 05:37 PM	#3
BetterRed null operator (he/him) Posts: 22,097 Karma: 30277960 Join Date: Mar 2012 Location: Sydney Australia Device: none	Try running calibre in Windows safe mode. If calibre works there then it's highly likely that a 3rd party program that's run at startup is generating the error. And I have lost count of posts that contain the statement "…it (calibre on network storage) has been working for years until now…" BR Last edited by BetterRed; 12-30-2025 at 05:41 PM.

Yesterday, 01:52 PM	#4
was698002 Junior Member Posts: 2 Karma: 10 Join Date: Dec 2025 Device: phone	solved Vituperation unhelpful, solution follows- Problem caused by unfathomable entanglement of Win 11 user and group permissions with inheritance applied to linux filesystem in NAS. So- Create Library3 Robocopy Library2 to 3 without permissiohns (default) Verify copy with winmerge Delete Library2 Rename Library3 Library2 Bob's your uncle

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to access eBooks on Local NAS	td3	Which one should I buy?	13	10-16-2025 01:35 AM
How to access web server hosted on NAS while using KOreader?	BMANN2	Kobo Reader	1	03-25-2023 03:14 PM
NAS library	silverraven	Library Management	2	06-06-2018 12:21 PM
Access eBooks on a NAS (via Browser?)	SimonFinch	Related Tools	10	04-24-2014 12:12 AM
Library on NAS server?	bous	Calibre	5	11-26-2009 06:03 AM

12-30-2025, 12:53 PM	#2
theducks Well trained by Cats Posts: 31,385 Karma: 62500000 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Make sure the that folder has the same rights as the rest in the Library. But, you really are taking a risk with a WORKING Library on the network. It is not all just about multiple access issues.

Yesterday, 07:02 PM	#5
DNSB Bibliophagist Posts: 49,219 Karma: 174632678 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	I didn't see any vituperation. OTOH, I agree that using SQLite on a database on a network connected drive is an unnecessary risk. The creators of SQLite do not recommend it, the author of calibre does not recommend it and the users here have posted too often about running into issues with having their calibre library on a network connected drive. As @BetterRed said, most of those message do include that the user has done this for years before bad things happened.