Calibre won't start problem

[gkhenderson]

Recently calibre on my Windows 10 64bit PC won't run.

It displays the small start up panel with the user iterface start up message and then hangs. Never appears in the Task Manager. If I kill it and try again I usually get an error

"Failed to contact running instance of calibre try restarting calibre"

If I do I get the same response.

Same problem occurs if run calibre in Windows Safe mode,
Same problem if I try running in debug mode
Am using Calibre 6.1
Have tried deleting and reinstalling calibre - same result.

Any suggestions welcome

Graham Henderson

[kovidgoyal]

https://manual.calibre-ebook.com/faq...ing-on-windows

[BetterRed]

Originally Posted by gkhenderson

Never appears in the Task Manager. If I kill it and try again I usually get an error . . .

So how do you kill it?

Try this: after terminating all other active tasks, right click on empty space in the Taskbar and select Cascade windows - if calibre pops you're good to go.

BR

[gkhenderson]

Originally Posted by kovidgoyal

https://manual.calibre-ebook.com/faq...ing-on-windows

Thanks Kovid,

The article you pointed me to solved my problem - much appreciated

[gkhenderson]

Originally Posted by kovidgoyal

https://manual.calibre-ebook.com/faq...ing-on-windows

Still having problems starting calibre. Sometimes it works but mostly won't start
running in debug mode from cmd.exe produces error
MduleNotFoundError: No module named 'Stringio'

[gkhenderson]

Here is the full debug output
Microsoft Windows [Version 10.0.19045.2965]
(c) Microsoft Corporation. All rights reserved.

C:\Users\Graham>calibre-debug -g
calibre 6.1 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None
Failed to initialize plugin: 'C:\\Users\\Graham\\AppData\\Roaming\\calibre\\plu gins\\DeDRM.zip'
Traceback (most recent call last):
File "calibre\customize\ui.py", line 744, in initialize_plugins
File "calibre\customize\ui.py", line 64, in load_plugin
File "calibre\customize\zipplugin.py", line 304, in load
File "importlib\__init__.py", line 126, in import_module
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "calibre\customize\zipplugin.py", line 196, in exec_module
File "calibre\customize\zipplugin.py", line 192, in get_code
File "calibre_plugins.dedrm.__init__", line 169
print u"{0} v{1}: Copying needed library files from plugin's zip".format(PLUGIN_NAME, PLUGIN_VERSION)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?
Successfully initialized third party plugins: Find Duplicates (1, 9, 7) && Generate Cover (2, 2, 0) && Library Genesis (1, 2, 0) && Obok DeDRM (6, 5, 4)
QPA platform: windows
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 102.23899371069182 x 102.35820895522387
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[0.14] splash screen shown
[0.14] Initializing db...
[0.16] db initialized
[0.16] Constructing main UI...
Traceback (most recent call last):
File "calibre\gui2\ui.py", line 135, in __init__
File "calibre\gui2\ui.py", line 153, in init_iaction
File "calibre\customize\__init__.py", line 624, in load_actual_plugin
File "importlib\__init__.py", line 126, in import_module
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "calibre\customize\zipplugin.py", line 203, in exec_module
File "calibre_plugins.obok_dedrm.action", line 24, in <module>
File "calibre\customize\zipplugin.py", line 203, in exec_module
File "calibre_plugins.obok_dedrm.dialogs", line 30, in <module>
File "calibre\customize\zipplugin.py", line 203, in exec_module
File "calibre_plugins.obok_dedrm.utilities", line 10, in <module>
ModuleNotFoundError: No module named 'StringIO'

[theducks]

You need to NOT get help with that plugin here at MR. (Forum rules)
Ask where you got that OBOOK tool.

[kovidgoyal]

uninstall the dedrm plugin, its obsolete and replaced by nodrm anyway.

[DNSB]

Update to noDRM's version v10.0.3 or at least to Apprentice Harper's v7.21. The version you are running is an old version that is Python 2 only. Calibre since version 5.0 has used Python 3.

[gkhenderson]

Originally Posted by DNSB

Update to noDRM's version v10.0.3 or at least to Apprentice Harper's v7.21. The version you are running is an old version that is Python 2 only. Calibre since version 5.0 has used Python 3.

I have found thst Calibre does eventually run if left alone but it takes 40-45 minutes. thanks for the advice on the DRM plugins. I have done that but it made no difference - still sits for 40 minutes then starts. I think it maybe a Windows Defender issue as I am also running Acronis.

[DNSB]

Originally Posted by gkhenderson

I have found thst Calibre does eventually run if left alone but it takes 40-45 minutes. thanks for the advice on the DRM plugins. I have done that but it made no difference - still sits for 40 minutes then starts. I think it maybe a Windows Defender issue as I am also running Acronis.

You might want to try starting Windows in safe mode and then running calibre. This will eliminate issues with most 3rd party addons. If you are not sure about how to start Windows 10 in safe mode, you can check this Lenovo link.

[gkhenderson]

Originally Posted by DNSB

You might want to try starting Windows in safe mode and then running calibre. This will eliminate issues with most 3rd party addons. If you are not sure about how to start Windows 10 in safe mode, you can check this Lenovo link.

Yes I have done that. No change - calibre still takes 40 minutes to start

[theducks]

corrected

By any chance had you ever tried using Save To Folder (now the popup say Export...). It is the 3.5" floppy icon.
Connect to folder is inside the Connect Share icon.

You need to Eject that device. I bet it is trying to mount a missing storage deviceCorrected

[JSWolf]

Have you thought of trying the latest version of Calibre instead of an older version?

The current version is 6.19.1 as of now.