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Old 11-01-2020, 02:30 PM   #1
deb27
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Question e-book viewer not responding

Recently my e-book viewer stopped working. I was running Calibre 5.4.2 and when I double click on a book, all I get is the window frame from the e-book viewer which says Loading book and Not Responding. After searching this forum, I tried running calibre from the command line
Quote:
calibre-debug -w filename
I've attached screen shots of what I got.
Meanwhile, I discovered that Apprentice Alf plugin was not compatible with Calibre 5 so I switched back to 4.23. Tried the same experiments and got the same result.

I'm running Windows 10 Pro version 10.0.19041.
I use Bitdefender Total Security AV and I did look through all the logs to ensure that it wasn't blocking any calibre processes. I saw no evidence of that.
I'm not sure what to try next.
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Old 11-01-2020, 11:54 PM   #2
kovidgoyal
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Uninstall, delete C:\\Program Files\\Calibre2
(or wherever you chose to install calibre). Then re-install. And
dont worry, uninstalling will not affect your books/settings.
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Old 11-02-2020, 12:14 PM   #3
deb27
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No luck.
After the uninstall, the C:\\Program Files\\Calibre2 folder was gone. I did not have to delete it. I searched the C drive for "Calibre2" and it was not found.

After the install I double clicked on several books (mobi format and azw3) but had the same problem as before (empty window frame not responding).

I installed calibre-64bit-4.23.0.msi

What else can I try? Is there debug information I can get which would help?
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Old 11-02-2020, 12:28 PM   #4
kovidgoyal
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reboot in safe mode, check if it works there. If it does its your antivirus. The log you provided already tells me its a corrupted install (see th eline about the internal ICU error). If re-installing did not fix it it most likely means something on your computer is deleting/quarantining a file from the calibre isntallation folder.
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Old 11-02-2020, 02:54 PM   #5
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Making progress!
Rebooting in safe mode worked.
Next, I disabled all non-windows startup services using msconfig.
That worked too.
Next I enabled all non-windows startup services except for those related to BitDefender (my AV/security software)
That worked too.

So...you are correct. It must be the antivirus/security software.

The next question is, there may be a setting in that software to tell it to ignore the calibre files/folders. Which folders are the ones I should try to protect? Just "Program Files/calibre2"? Or are there other folders?

Thanks for all the help!
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Old 11-02-2020, 10:25 PM   #6
kovidgoyal
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For this error, yes, the Calibre2 folder is whats needed.
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Old 11-03-2020, 12:24 PM   #7
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Thank you for all the help!

One interesting twist to the story...after I reset all of my windows startup options back to their original setting, my BitDefender total security stopped working. I uninstalled it and reinstalled it.
Now the e-book viewer is working again.

So the problem is solved although I'll probably never know why.
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