I updated iTunes to 11.0.4 and all my playlists are missing.
Are only playlists missing or also the songs and movies?
Or is simply the sidebar with the paylists not showing? To reveal it, use the command "View > Show Sidebar ⌥⌘S" from the main menu bar.
I've tried that and it didn't work.
I followed the advice on the iTunes website and it didn't work.
What advice did you follow? What exactly have you tried so far? Is this, what you tried:http://support.apple.com/kb/HT1451 ?
Yes, I tried that.
I am unable to set up NEW playlists also.
Is the command "File > New > Playlist" grayed out or ineffective? What exactly happens when you try?
It isn't 'grayed' out, just ineffective. No new playlists can be set up.
Thank you. I appreciate any help.
It looks like your iTunes download and install is incomplete.
Try to reinstall iTunes and restore the previous library file, see: