Error: Contacting Calibre failed

fad42va · 02-05-2022, 10:17 AM

Hi folks, I've been using Calibre for about 10 years error free. Today I received this error:

Failed to connect to Listener at: \\.\pipe\CalibreGUI-fjd42x with error: QLocalSocket::connectToServer: Invalid name

b'launched:["calibre.exe"]'

I'm running Windows 11 and have been for about 6 weeks. Not sure of the version of Calibre I was on (probably 5.34 or 5.35), but 5.36 was available so I downloaded it, ran it, and received the same error on startup. As far as I can tell, this error is not preventing me from running the program or reading books using the built-in eReader. Any help would be appreciated

kovidgoyal · 02-05-2022, 07:38 PM

Its harmless it happens if you restart calibre too soon after shutting it down, simply ignore it.

ownedbycats · 02-06-2022, 09:10 AM

I've also had it happen when Calibre processes get stuck open. If it doesn't go away after a minute or two, check task manager.

booknerd1000 · 12-28-2022, 07:55 PM

Quote:

Originally Posted by kovidgoyal

Its harmless it happens if you restart calibre too soon after shutting it down, simply ignore it.

I've rebooted several times but this same error keeps preventing me from starting. I've been using the windows app without issue for about 2 years now. I upgraded to the latest version a few machine reboots ago, suddenly today I was unable to connect to the content server and after rebooting have not been able to load the GUI at all.

Running Windows 10. Have installed the latest version of Calibre (6.10, I believe). Have already gone through the uninstall, reinstall dance. Any ideas?

kovidgoyal · 12-28-2022, 10:07 PM

Reboot in safe mode and see if the problem persists, if not its some software interfering with calibre, most likely culprit is the antivirus. You can try excluding calibre.exe from it.

tadpole · 03-14-2023, 05:19 PM

I had to get a new laptop and got Calibre re-installed. But now every time that I try to open it I get the message....

Failed to contact running instance of calibre, try restarting calibre

Was there a problem with the install? Should I try downloading the set up file again?

theducks · 03-14-2023, 06:22 PM

Quote:

Originally Posted by tadpole

I had to get a new laptop and got Calibre re-installed. But now every time that I try to open it I get the message....

Failed to contact running instance of calibre, try restarting calibre

Was there a problem with the install? Should I try downloading the set up file again?

What OS?
Have you whitelisted calibre with the anti-whatever suite that came with your machine?

ownedbycats · 03-14-2023, 06:23 PM

Quote:

Originally Posted by tadpole

I had to get a new laptop and got Calibre re-installed. But now every time that I try to open it I get the message....

Failed to contact running instance of calibre, try restarting calibre

Was there a problem with the install? Should I try downloading the set up file again?

Check task manager. It might've gotten stuck running in the background.

tadpole · 03-17-2023, 01:10 AM

It must have been some type of fluke incident. It only happened a few times, and here lately when I log in, all is well.

02-05-2022, 10:17 AM	#1
fad42va Junior Member Posts: 1 Karma: 10 Join Date: Mar 2011 Device: Nook Color	Error: Contacting Calibre failed Hi folks, I've been using Calibre for about 10 years error free. Today I received this error: Failed to connect to Listener at: \\.\pipe\CalibreGUI-fjd42x with error: QLocalSocket::connectToServer: Invalid name b'launched:["calibre.exe"]' I'm running Windows 11 and have been for about 6 weeks. Not sure of the version of Calibre I was on (probably 5.34 or 5.35), but 5.36 was available so I downloaded it, ran it, and received the same error on startup. As far as I can tell, this error is not preventing me from running the program or reading books using the built-in eReader. Any help would be appreciated

03-14-2023, 05:19 PM	#6
tadpole Enthusiast Posts: 49 Karma: 11516 Join Date: Oct 2013 Device: kobo aura hd	Contacting Calibre failed I had to get a new laptop and got Calibre re-installed. But now every time that I try to open it I get the message.... Failed to contact running instance of calibre, try restarting calibre Was there a problem with the install? Should I try downloading the set up file again?

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02-05-2022, 07:38 PM	#2
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Its harmless it happens if you restart calibre too soon after shutting it down, simply ignore it.

02-06-2022, 09:10 AM	#3
ownedbycats Custom User Title Posts: 8,643 Karma: 61234567 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	I've also had it happen when Calibre processes get stuck open. If it doesn't go away after a minute or two, check task manager.

12-28-2022, 10:07 PM	#5
kovidgoyal creator of calibre Posts: 43,860 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Reboot in safe mode and see if the problem persists, if not its some software interfering with calibre, most likely culprit is the antivirus. You can try excluding calibre.exe from it.

03-17-2023, 01:10 AM	#9
tadpole Enthusiast Posts: 49 Karma: 11516 Join Date: Oct 2013 Device: kobo aura hd	It must have been some type of fluke incident. It only happened a few times, and here lately when I log in, all is well.