Calibre will not open

Crow6 · 11-19-2022, 07:37 AM

Hi all - I have recently updated my Calibre 6.7.1. and 6.8, but Calibre will not now open. I have over 10k books on the system and do not wish to lose them. I am using Windows 10. Can you advise please? Chris

ownedbycats · 11-19-2022, 07:51 AM

If you haven't already tried, reboot, or at least check the task manager for open calibre.exe processes. Calibre won't open if it's stuck running in the background.

If that still doesn't work, run the installer again. It'll offer you a repair install. Hopefully that'll fix it.

Crow6 · 11-20-2022, 07:05 AM

Thank you. If I install again will i lose my books? Chris

Sirtel · 11-20-2022, 07:09 AM

Quote:

Originally Posted by Crow6

Thank you. If I install again will i lose my books? Chris

No. But don't use any third-party uninstallers. Those may delete you library along with the program.

By the way, you should make a back-up copy of your library - for example, to an external drive. So you won't lose your books if anything ever happens to your computer.

Crow6 · 11-29-2022, 01:56 PM

I took the plunge and downloaded Calibre again and all is well. It opens OK and books not lost. Thank you all for your help. Chris

luciaisacat · 12-01-2022, 04:05 PM

Happy for Crow6 happy-end, however I have a very similar, but unresolved problem (on Win10): starting with v. 6.8 after installation and launching the program appear running in background (i.e. in Windows Task Manager), but the Calibre window does not show up (no way to access the program). Reverting to v. 6.7 however solved the problem. I tried yesterday with v. 6.9 and the problem remains and I am stuck with a perfectly working v. 6.7. Anyone has any idea of what could be causing this issue? Thanks!

DNSB · 12-01-2022, 06:49 PM

Have you tried either cascading windows to see if this brings the calibre window into view or hitting alt-space, then click on M(ove) and then using the left/right arrow keys to bring the calibre windows into view?

One other option is to hit Windows-Tab and see if the calibre window show up in the list.

If not, it suggests that you are having a video driver issue. A quick search on this forum will come up with quite a few threads on video issues and possible fixes.

luciaisacat · 12-18-2022, 11:11 AM

Quote:

Originally Posted by DNSB

[...] or hitting alt-space, then click on M(ove) and then using the left/right arrow keys to bring the calibre windows into view?

Eventually the second suggestion worked fine, it's the first time I notice this strange behavior... many thanks!

ajs4books · 12-18-2022, 11:46 AM

I updated to Calibre 6.10.0 and after installing the program failed to open. I went back to 6.9, and after re-installation it opened...once. Now, when I try to run that, either from the pinned shortcut or the program location, it doesn't load. The repair function ran but didn't help. I don't want to have to uninstall and reinstall every time I want to use the program. What do I do next?

ajs4books · 12-19-2022, 10:35 AM

Update: After uninstalling/reinstalling 6.9 for Windows several times, it appears to be working again. I'm still not sure about trying to install 6.10. Has anyone else experienced this problem?

Quote:

Originally Posted by ajs4books

I updated to Calibre 6.10.0 and after installing the program failed to open. I went back to 6.9, and after re-installation it opened...once. Now, when I try to run that, either from the pinned shortcut or the program location, it doesn't load. The repair function ran but didn't help. I don't want to have to uninstall and reinstall every time I want to use the program. What do I do next?

11-19-2022, 07:37 AM	#1
Crow6 Junior Member Posts: 4 Karma: 10 Join Date: Nov 2022 Device: Lenovo Yoga	Calibre will not open Hi all - I have recently updated my Calibre 6.7.1. and 6.8, but Calibre will not now open. I have over 10k books on the system and do not wish to lose them. I am using Windows 10. Can you advise please? Chris

12-18-2022, 11:46 AM	#9
ajs4books Junior Member Posts: 6 Karma: 10 Join Date: Dec 2015 Device: SONY PRS-T3S	Problem with updating -- Calibre will not run any version now I updated to Calibre 6.10.0 and after installing the program failed to open. I went back to 6.9, and after re-installation it opened...once. Now, when I try to run that, either from the pinned shortcut or the program location, it doesn't load. The repair function ran but didn't help. I don't want to have to uninstall and reinstall every time I want to use the program. What do I do next?

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11-19-2022, 07:51 AM	#2
ownedbycats Grand Sorcerer Posts: 5,539 Karma: 28562994 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	If you haven't already tried, reboot, or at least check the task manager for open calibre.exe processes. Calibre won't open if it's stuck running in the background. If that still doesn't work, run the installer again. It'll offer you a repair install. Hopefully that'll fix it.

11-20-2022, 07:05 AM	#3
Crow6 Junior Member Posts: 4 Karma: 10 Join Date: Nov 2022 Device: Lenovo Yoga	Thank you. If I install again will i lose my books? Chris

11-29-2022, 01:56 PM	#5
Crow6 Junior Member Posts: 4 Karma: 10 Join Date: Nov 2022 Device: Lenovo Yoga	I took the plunge and downloaded Calibre again and all is well. It opens OK and books not lost. Thank you all for your help. Chris

12-01-2022, 04:05 PM	#6
luciaisacat Enthusiast Posts: 27 Karma: 10 Join Date: May 2012 Device: android	Happy for Crow6 happy-end, however I have a very similar, but unresolved problem (on Win10): starting with v. 6.8 after installation and launching the program appear running in background (i.e. in Windows Task Manager), but the Calibre window does not show up (no way to access the program). Reverting to v. 6.7 however solved the problem. I tried yesterday with v. 6.9 and the problem remains and I am stuck with a perfectly working v. 6.7. Anyone has any idea of what could be causing this issue? Thanks!

12-01-2022, 06:49 PM	#7
DNSB Bibliophagist Posts: 23,368 Karma: 104708851 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Forma, Clara HD, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Have you tried either cascading windows to see if this brings the calibre window into view or hitting alt-space, then click on M(ove) and then using the left/right arrow keys to bring the calibre windows into view? One other option is to hit Windows-Tab and see if the calibre window show up in the list. If not, it suggests that you are having a video driver issue. A quick search on this forum will come up with quite a few threads on video issues and possible fixes.