MobileRead Forums - View Single Post - Viewer and Editor have stopped working in Calibre

ianmacdo · 06-09-2026, 04:15 PM

Viewer and Editor have stopped working in Calibre.
If I try to open an epub nothing happens. View or Edit book.

Im running a desktop(too old for win11) with windows 10.
I don't know what version this started with. I usually just use calibre for loading my kobo and that still works fine. It used to work fine though.

calibre-debug -w
---------------
QPA platform: windows
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 81.55183946488295 x 81.64285714285714
ApplicationPaletteChange event ignored
Using calibre Qt style: True
ApplicationPaletteChange event received
Sandboxing disabled by user.

I tried downloading the calibre portable version, still doesn't work.

I tried starting windows in safe mode, and then the viewer now works, but only in safe mode, back in regular mode it does not work.

Thanks for any help.

06-09-2026, 04:15 PM	#1
ianmacdo Junior Member Posts: 6 Karma: 10 Join Date: Jun 2014 Device: Kobo Aura ONE	Viewer and Editor have stopped working in Calibre Viewer and Editor have stopped working in Calibre. If I try to open an epub nothing happens. View or Edit book. Im running a desktop(too old for win11) with windows 10. I don't know what version this started with. I usually just use calibre for loading my kobo and that still works fine. It used to work fine though. calibre-debug -w --------------- QPA platform: windows devicePixelRatio: 1.0 logicalDpi: 96.0 x 96.0 physicalDpi: 81.55183946488295 x 81.64285714285714 ApplicationPaletteChange event ignored Using calibre Qt style: True ApplicationPaletteChange event received Sandboxing disabled by user. I tried downloading the calibre portable version, still doesn't work. I tried starting windows in safe mode, and then the viewer now works, but only in safe mode, back in regular mode it does not work. Thanks for any help.