ERROR: Cannot add books: Failed to add any books

MishoCana · 02-11-2023, 09:07 PM

Got an error when I try to add new books out of sudden:

calibre, version 6.12.0
ERROR: Cannot add books: Failed to add any books, click "Show details" for more information.

Failed to start worker process
Traceback (most recent call last):
File "calibre\utils\ipc\pool.py", line 203, in start_worker
File "calibre\utils\ipc\pool.py", line 193, in create_worker
File "calibre\utils\ipc\pool.py", line 74, in start_worker
File "calibre\utils\ipc\simple_worker.py", line 161, in start_pipe_worker
File "subprocess.py", line 966, in __init__
File "subprocess.py", line 1435, in _execute_child
OSError: [WinError 740] The requested operation requires elevation

theducks · 02-12-2023, 04:31 AM

Most likely UAC or your anti-virus is blocking calibre-worker
What version of Windows?

MishoCana · 02-16-2023, 12:11 AM

Windows 11

It started out of sudden!!

theducks · 02-16-2023, 07:11 AM

Quote:

Originally Posted by MishoCana

Windows 11

It started out of sudden!!

You probably need to tell your security suite that Calibre and workers are OK to run. (sorry, can't provide the steps, still on W10. my HW is too old and the one time I did help a friend set up W11, I hated it)

02-11-2023, 09:07 PM	#1
MishoCana Member Posts: 13 Karma: 10 Join Date: Jan 2023 Device: iPad	ERROR: Cannot add books: Failed to add any books Got an error when I try to add new books out of sudden: calibre, version 6.12.0 ERROR: Cannot add books: Failed to add any books, click "Show details" for more information. Failed to start worker process Traceback (most recent call last): File "calibre\utils\ipc\pool.py", line 203, in start_worker File "calibre\utils\ipc\pool.py", line 193, in create_worker File "calibre\utils\ipc\pool.py", line 74, in start_worker File "calibre\utils\ipc\simple_worker.py", line 161, in start_pipe_worker File "subprocess.py", line 966, in __init__ File "subprocess.py", line 1435, in _execute_child OSError: [WinError 740] The requested operation requires elevation

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02-12-2023, 04:31 AM	#2
theducks Well trained by Cats Posts: 29,817 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Most likely UAC or your anti-virus is blocking calibre-worker What version of Windows?

02-16-2023, 12:11 AM	#3
MishoCana Member Posts: 13 Karma: 10 Join Date: Jan 2023 Device: iPad	Windows 11 It started out of sudden!!