Help with Json error (Error code: 1)

[daviddanger86]

When I attempt to run calibre 3.41.3 (64 bit) on my Windows 10 pc I get an error.

"Python function terminated unexpectedly
No JSON object could be decoded (Error Code:1)"

I just updated from a previous version which ran without issues. Other than the update, nothing has changed.

Things I have tried:
-Reboot
-Running as admin
-Uninstall // Restart // Reinstall // Restart

All things lead to this message.

The following is the (calibre-debug -g)debug info:

Python function terminated unexpectedly
No JSON object could be decoded (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 101, in main
File "site.py", line 77, in run_entry_point
File "site-packages\calibre\__init__.py", line 30, in <module>
File "site-packages\calibre\startup.py", line 121, in <module>
File "site-packages\calibre\utils\localization.py", line 203, in set_translators
File "site-packages\calibre\utils\localization.py", line 88, in get_lang
File "site-packages\calibre\utils\config_base.py", line 636, in <module>
File "site-packages\calibre\utils\config_base.py", line 632, in read_tweaks
File "site-packages\calibre\utils\config_base.py", line 616, in read_custom_tweaks
File "site-packages\calibre\utils\config_base.py", line 98, in json_loads
File "json\__init__.py", line 352, in loads
File "json\decoder.py", line 364, in decode
File "json\decoder.py", line 382, in raw_decode
ValueError: No JSON object could be decoded

Thanks for reading, and should you need any additional information I'll gladly provide it.

-David

[theducks]

My WAG
Something is preventing the Calibre config directory from being accessed.
there are JSON files that control your settings config

[daviddanger86]

So, does that mean I can delete - or default - these config files somehow?

Could that theoretically be a solution?

[BetterRed]

Before you delete the entire directory, back it up first.

And then try deleting the tweaks.json file. If that works you would have only lost any settings you changed in Preferences->Tweaks settings.

If you don't know where your configuration folder is, search for a file named 'global.py'.

BR

[jlb2018]

I am having the same problem, but with the 32-bit version. How do I fix this? I am kind of computer challenged, so please give me a simple fix. I did not understand what was written above, about deleting files, etc. Thanks!

[kovidgoyal]

Search your computer for the following two files:

1) tweaks.json
2) tweaks.py

delete them when they are found. Now start calibre, hopefully you will be fine.

[jlb2018]

Thank You, so much! This fixed it!