I've recently run into a rather odd set of symptoms with Calibre and I was wondering if anyone else had encountered anything similar. For context, I am running Windows 10 64-bit and I do not use any always-on third-party security software.
The problem is I cannot seem to do anything in Calibre that would open a new (non-dialog) window. That is to say, I can open up settings, run plug-ins, or tweak metadata just fine, but when I try to view an e-book with the built-in reader or open up the book editor, nothing happens. The "busy" cursor spins for a moment and then it goes back to normal with no result.
On top of that, if I close Calibre, I am unable to re-open the program again unless I first log off my Windows user account and then log back in. The process shows as running in the Task Manager, but no window displays. Killing the task and then attempting to re-open it also makes no difference.
At the same time this started happening, I was no longer able to complete ePUB -> MOBI conversions of any books. Though, conversions had been getting more and more likely to "stick" at 67% for the past couple months, so that may be a separate issue. (I would wait 15 minutes for a book to convert, it would appear to have gotten stuck, I would cancel the job and then initiate conversion again and it would complete in less than a minute the second time.)
If, on a fresh login, I browse to an epub file and double-click it, it opens up in Calibre's viewer just fine, but then I am unable to open the main Calibre program after doing so.
I tried completely removing all traces of Calibre 2.51.0 from my computer, using Add/Remove Programs and then deleting any leftover registry settings in both HKLM and HKCU, completely deleting my library from my documents folder and all calibre directories from Users\AppData, and rebooted.
I then tried installing version 2.48.0 and found that it exhibited the exact same same symptoms even in the clean environment. Finally, I wiped everything clean once again and tried installing version 1.48.0 in case it was a Qt 5 issue. Viola, everything now works properly again! I copied my old library, plugins and settings folders back into place and everything works just fine under the old version.
I have not, to my knowledge, installed any new software other than Windows updates before this started happening.
For now I am fine running 1.48.0, but if anyone has any thoughts on potential resolutions for the problem I'd love to hear them. Or if others have the same problem and it's not just a weird glitch solely on my computer, I'd be happy to assist in tracking it down with providing any log files or running any tests requested.
The problem is I cannot seem to do anything in Calibre that would open a new (non-dialog) window. That is to say, I can open up settings, run plug-ins, or tweak metadata just fine, but when I try to view an e-book with the built-in reader or open up the book editor, nothing happens. The "busy" cursor spins for a moment and then it goes back to normal with no result.
On top of that, if I close Calibre, I am unable to re-open the program again unless I first log off my Windows user account and then log back in. The process shows as running in the Task Manager, but no window displays. Killing the task and then attempting to re-open it also makes no difference.
At the same time this started happening, I was no longer able to complete ePUB -> MOBI conversions of any books. Though, conversions had been getting more and more likely to "stick" at 67% for the past couple months, so that may be a separate issue. (I would wait 15 minutes for a book to convert, it would appear to have gotten stuck, I would cancel the job and then initiate conversion again and it would complete in less than a minute the second time.)
If, on a fresh login, I browse to an epub file and double-click it, it opens up in Calibre's viewer just fine, but then I am unable to open the main Calibre program after doing so.
I tried completely removing all traces of Calibre 2.51.0 from my computer, using Add/Remove Programs and then deleting any leftover registry settings in both HKLM and HKCU, completely deleting my library from my documents folder and all calibre directories from Users\AppData, and rebooted.
I then tried installing version 2.48.0 and found that it exhibited the exact same same symptoms even in the clean environment. Finally, I wiped everything clean once again and tried installing version 1.48.0 in case it was a Qt 5 issue. Viola, everything now works properly again! I copied my old library, plugins and settings folders back into place and everything works just fine under the old version.
I have not, to my knowledge, installed any new software other than Windows updates before this started happening.
For now I am fine running 1.48.0, but if anyone has any thoughts on potential resolutions for the problem I'd love to hear them. Or if others have the same problem and it's not just a weird glitch solely on my computer, I'd be happy to assist in tracking it down with providing any log files or running any tests requested.