Help! Calibre won't open

[miakay]

I'm new to the forum because I'm trying to find a solution for Calibre not opening. I was using Calibre 3.34.0 and received an Error 3 message. System can't find pathway u'G: etc. Using Windows 10. I uninstalled Calibre and reinstalled 3.39.1. I'm not getting the error message anymore but absolutely nothing happens when I try to open it. I've been using Calibre for years and transferred my files to a new computer 3 months ago and now suddenly have problems. Thanks in advance!

[BetterRed]

Check your AV quarantine entries.

I had something similar the other day, ran a new version of a program (not calibre) by double clicking on the .exe, not only did nothing happen, but the .exe disappeared from under my nose

For some reason Malwarebytes thought it was malware and quarantined it. . . and I had turned off MWB's notifications messages, hence the abruptly disappearing .exe

I deleted the program from MWB's quarantine pen, and added it into MWBs exclusion list and all was well.

Added : also see Calibre won't start

BR

[DaltonST]

Originally Posted by miakay

...but absolutely nothing happens when I try to open it.

If your AV is not the problem, did you recently upgrade (whether you knew it at the time or not) your brand new PC from an original Windows 10 version 1803 to version 1809? If so, this may give you some ideas:


https://www.mobileread.com/forums/sh...d.php?t=315508


Good luck.


DaltonST

[miakay]

Thanks for the help so far, I'll look into your suggestions. I have tried all the fixes on the FAQ page with no result. I possibly unknowingly upgraded Windows 10 to the newer version..., will check that link you sent.

Thanks again, in case I need more help!

Here is the report from the command prompt
Microsoft Windows [Version 10.0.17134.590]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\Users\Kay>calibre-debug -g
calibre 3.39.1 embedded-python: True is64bit: False
Windows-10-10.0.17134-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.17134')
Python 2.7.15+
Windows: ('10', '10.0.17134', 'SP0', u'Multiprocessor Free')
Interface language: None
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 112.110344828 x 114.778242678
Using calibre Qt style: True

C:\Users\Kay>

[miakay]

Just put Windows 10 into safe mode and Calibre still won't open

[kovidgoyal]

There is no actual error in calibre-debug -g output are you sure calibre is not simply running offscreen somewhere?

[miakay]

Kovid Goyal, no I'm not sure, where would it be? How can I find it??? Please bear with me, I need some help with very.simple.intstructions.

[BetterRed]

miakay - start task manager (Ctrl+Shift+Esc), your looking for "The main calibre program"



Or anything else with named "calibre ..."

Also look in the notify tray (the ^ over near the clock (probably))

Do you have or have you had multiple monitors?

BR

[miakay]

Originally Posted by BetterRed

miakay - start task manager (Ctrl+Shift+Esc), your looking for "The main calibre program"

Attachment 170099

Or anything else with named "calibre ..."

Also look in the notify tray (the ^ over near the clock (probably))

Do you have or have you had multiple monitors?

BR

BR, thanks for your help so far but I am still unable to open/find Calibre. I have started in safemode. I have checked task manager .Nothing. The problem is obviously with my Windows 10 upgrade. The new error message is saying "Failed to create Calibre Library, you will be asked to create a new library location".
How do I do this?

[miakay]

Originally Posted by miakay

BR, thanks for your help so far but I am still unable to open/find Calibre. I have started in safemode. I have checked task manager .Nothing. The problem is obviously with my Windows 10 upgrade. The new error message is saying "Failed to create Calibre Library, you will be asked to create a new library location".
How do I do this?

Forgot to mention, all the posts and google results have instructions on how to create a new location but it requires Calibre to be open to be able to click on the library icon....

Problem solved!!! After trying EVERYTHING I simply chose the old location when asked to create a new location , hahaha

[BetterRed]

Originally Posted by miakay

BR, thanks for your help so far but I am still unable to open/find Calibre. I have started in safemode. I have checked task manager .Nothing. The problem is obviously with my Windows 10 upgrade. The new error message is saying "Failed to create Calibre Library, you will be asked to create a new library location".
How do I do this?

If calibre won't start I don't think you can create a new library. But, I just noticed your are running 32bit calibre, but your Windows is 64 bit

Windows-10-10.0.17134-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows

So install the 64 bit version, you can have both installed, and they will use the same configuration and libraries. Running 32bit programs on 64 bit windows is a valid thing to do, but sometimes for no known reason windows will decide it doesn't like one or the other <sigh>.

If that doesn't solve the the problem, here are a couple of calibre command options to try.

Run calibre from the command prompt with the --ignore-plugins option. I doubt this will solve the problem, but it's worth a try.

If it still won't start, try the --with-library option, using the path to your library in double quotes e.g. calibre --with-library options "C:\Users\Mia Kay\My Books"

Could you capture and post any error messages as text (calibre messages) or screen shots (windows messages), and do you know where your calibre configuration folder is located?

BR