MobileRead Forums
Register Guidelines E-Books Today's Posts Search

Go Back   MobileRead Forums > E-Book Software > Calibre
Reload this Page Calibre doesn't open on this machine

Notices

Reply
Page 1 of 3 1 23
 
Thread Tools Search this Thread
Old 07-08-2025, 08:12 AM   #1
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Calibre doesn't open on this machine
I have installed Calibre 8.40 and other versions on a updated Windows 10 LTS 1607 with all patches but it does not start anymore. No signal of any type. I have rebooted, reinstalled tried from CMD but nothing!

I have also unistalled Calibre, deleted the installation folder, rebooted and started again with no success.

Here is the debug output
What should I do now?
Spoiler:
Code:
calibre 8.4 embedded-python: True
Windows-10-10.0.14393-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.14393')
Python 3.11.12
Windows: ('10', '10.0.14393', 'SP0', 'Multiprocessor Free')
Interface language: it
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Failed to import PyQt module: PyQt6.QtWidgets with error: DLL load failed while importing QtWidgets: Impossibile trovare la procedura specificata.
Traceback (most recent call last):
File "runpy.py", line 198, in _run_module_as_main
File "runpy.py", line 88, in _run_code
File "site.py", line 83, in <module>
File "site.py", line 78, in main
File "site.py", line 50, in run_entry_point
File "calibre\debug.py", line 234, in main
File "calibre\gui_launch.py", line 72, in calibre
File "calibre\gui_launch.py", line 51, in register_with_default_programs
File "bypy-importer.py", line 279, in exec_module
File "calibre\gui2\__init__.py", line 15, in <module>
ImportError: cannot import name 'QApplication' from 'qt.core' (C:\Program Files\Calibre2\app\bin\python-lib.bypy.frozen\qt\core.pyc)
Last edited by chaley; 07-08-2025 at 08:44 AM. Reason: Cleaned up log file and put it behind a spoiler
Giuseppe Chillem is offline   Reply With Quote
Old 07-08-2025, 08:50 AM   #2
kovidgoyal
creator of calibre
kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.
 
kovidgoyal's Avatar
 
Posts: 45,609
Karma: 28549044
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
that's an error loading a DLL, try rebooting in safe mode in case its caused by some program interfering.
kovidgoyal is offline   Reply With Quote
Advert
Old 07-16-2025, 10:02 PM   #3
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by kovidgoyal View Post
that's an error loading a DLL, try rebooting in safe mode in case its caused by some program interfering.
I have rebooted in safe mode and tried to start Calibre with no luck, it does not open.
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 12:05 AM   #4
kovidgoyal
creator of calibre
kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.kovidgoyal ought to be getting tired of karma fortunes by now.
 
kovidgoyal's Avatar
 
Posts: 45,609
Karma: 28549044
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
Hmmm no clue then, is this specific to 8.x? Try uninstalling and installing the last 7.x version instead from https://download.calibre-ebook.com/
kovidgoyal is offline   Reply With Quote
Old 07-17-2025, 12:17 AM   #5
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 80,789
Karma: 150249619
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by Giuseppe Chillem View Post
I have rebooted in safe mode and tried to start Calibre with no luck, it does not open.
Before going back to the latest version 7, try the latest version 8 and see what happens.
JSWolf is offline   Reply With Quote
Advert
Old 07-17-2025, 08:01 AM   #6
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by JSWolf View Post
Before going back to the latest version 7, try the latest version 8 and see what happens.
I have already tried with no success.
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 08:11 AM   #7
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by kovidgoyal View Post
Hmmm no clue then, is this specific to 8.x? Try uninstalling and installing the last 7.x version instead from https://download.calibre-ebook.com/
I have done it and Calibre starts. Version 7.0.0 here
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 09:14 AM   #8
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by kovidgoyal View Post
Hmmm no clue then, is this specific to 8.x? Try uninstalling and installing the last 7.x version instead from https://download.calibre-ebook.com/
I have tested from version 7.0.0 and upward. It works up to 7.26.0. Version 8.0.0 does not work.
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 09:20 AM   #9
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 80,789
Karma: 150249619
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by Giuseppe Chillem View Post
I have tested from version 7.0.0 and upward. It works up to 7.26.0. Version 8.0.0 does not work.
Now try installing the portable version of calibre 8 (latest version) and see how it goes.
JSWolf is offline   Reply With Quote
Old 07-17-2025, 10:12 AM   #10
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by JSWolf View Post
Now try installing the portable version of calibre 8 (latest version) and see how it goes.
No luck, it does not start
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 10:24 AM   #11
chaley
Grand Sorcerer
chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.chaley ought to be getting tired of karma fortunes by now.
 
Posts: 12,525
Karma: 8065948
Join Date: Jan 2010
Location: Notts, England
Device: Kobo Libra 2
Perhaps a windows system file check would fix things.
chaley is offline   Reply With Quote
Old 07-17-2025, 12:53 PM   #12
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by chaley View Post
Perhaps a windows system file check would fix things.
I have done what you have suggested with no success, Calibre does not open.
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 06:31 PM   #13
Doitsu
Grand Sorcerer
Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.Doitsu ought to be getting tired of karma fortunes by now.
 
Doitsu's Avatar
 
Posts: 5,763
Karma: 24088559
Join Date: Dec 2010
Device: Kindle PW2
Unfortunately, Qt6.9 requires Windows 10 (version 1809 or later) or Windows 11.
Seems you're stuck with Calibre 7.26.0.
Doitsu is offline   Reply With Quote
Old 07-17-2025, 07:32 PM   #14
Giuseppe Chillem
Groupie
Giuseppe Chillem doesn't litterGiuseppe Chillem doesn't litter
 
Giuseppe Chillem's Avatar
 
Posts: 191
Karma: 134
Join Date: May 2010
Device: IREX DR1000
Quote:
Originally Posted by Doitsu View Post
Unfortunately, Qt6.9 requires Windows 10 (version 1809 or later) or Windows 11.
Seems you're stuck with Calibre 7.26.0.
So we have found the source of the problem.
Giuseppe Chillem is offline   Reply With Quote
Old 07-17-2025, 07:54 PM   #15
DNSB
Bibliophagist
DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.DNSB ought to be getting tired of karma fortunes by now.
 
DNSB's Avatar
 
Posts: 48,197
Karma: 174315444
Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
Out of curiosity, why are you still using that antique version of Windows 10? Unless you have purchased the extended support which would expire in Oct. 2026, you are long out of support since the standard support expired in Oct. 2021.
DNSB is offline   Reply With Quote
Reply
Page 1 of 3 1 23

« Previous Thread | Next Thread »

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Calibre doesn't open AnnaSartin Calibre 5 09-14-2024 08:15 PM
Calibre doesn´t open acsm bally81 Plugins 2 11-02-2022 06:27 PM
[MacOS] Calibre doesn't open zamrin Calibre 0 12-25-2020 05:13 PM
Calibre window doesn't open robleyd Calibre 2 07-29-2011 10:29 AM
Calibre for OS X doesn't want to open thibaulthalpern Calibre 2 03-14-2009 07:08 PM


All times are GMT -4. The time now is 02:13 PM.

Contact Us - FAQ - Guidelines - Privacy - Top

MobileRead.com is a privately owned, operated and funded community.