[davidfor]

Originally Posted by yonkyunior

I got message box "KeyError: u'#On'"
i tried reinstall the plugins but it is futile.

calibre, version 2.85.1
ERROR: Unhandled exception: <b>KeyError</b>:u'#On'

calibre 2.85.1 [64bit]  embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.9
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM (6, 3, 6) && OPML Importer (1, 0, 1) && Search The Internet (1, 7, 6) && Goodreads (1, 1, 12) && Author Book Count (2, 1, 5) && all recipes Recipe Reader (1, 0, 1) && Extract ISBN (1, 4, 4) && DOC Input (1, 0, 1) && Consolidate All Library Metadata (2, 0, 31) && Similar Stories (1, 0, 58) && User Category (1, 5, 3) && Overdrive Link (2, 13, 0) && Wiki Reader (2, 1, 0) && English Noun Frequency (1, 0, 7) && Barnes & Noble (1, 2, 14) && KoboBooks (1, 0, 0) && Prettify Cover (0, 9, 9) && Library Codes (1, 0, 30) && EpubSplit (2, 2, 0) && Save To Format (0, 0, 6) && FictionDB (1, 0, 10) && Clean Metadata (0, 0, 6) && Walk Search History (1, 3, 1) && Embed Comic Metadata (1, 3, 6) && Generate Cover (1, 5, 21) && View Manager (1, 3, 2) && APNX Generator (1, 1, 0) && Quick Preferences (1, 4, 1) && MultiColumnSearch (1, 0, 71) && My Tools (0, 0, 8) && Reading List (1, 6, 6) && Count Pages (1, 7, 0) && Drop Search Results (1, 0, 8) && Quality Check (1, 9, 11) && Read MP3 AudioBook metadata (1, 0, 79) && Modify ePub (1, 3, 13) && Import List (1, 1, 5) && FanFicFare (2, 12, 0) && EpubMerge (2, 1, 0) && Diaps Editing Toolbag (0, 3, 4) && Job Spy (1, 0, 56) && Manage Series (1, 2, 8) && Author Book Count Hierarchy (1, 1, 8) && Fantastic Fiction (1, 1, 6) && Resize Cover (1, 0, 2) && Find Duplicates (1, 6, 2) && Favourites Menu (1, 0, 4) && Goodreads Sync (1, 10, 1) && QuarantineAndScrub (3, 6, 103) && Overdrive Link* (2, 13, 0)
Traceback (most recent call last):
  File "calibre_plugins.reading_list.action", line 294, in about_to_show_menu
  File "calibre_plugins.reading_list.action", line 108, in rebuild_menus
KeyError: u'#On'

The error is in the line trying to find the name of the default list. Somehow, the list that is named as the default list has been removed. I can't think of a way that could happen.

You can try fixing this by adding the list again. To do this, go to the plugins page of the calibre preferences and find the plugin. Select it and press the "Customize plugin" button. The missing list is called "#On", so add a new list with that name. Set any of the other options you want and then save the changes. When Hopefully that will fix the problem.

If it doesn't, there is a way to clear the configuration or edit it more directly that should work.