I got this:
File not found at:
/Users/HBrazee/Music/A-M Classical/Unknown Album/Moonlight Sonata, movement 1.mp3
File not found at:
/Users/HBrazee/Music/Jerome Kern/Show Boat/02 Cap'n Andy's Calliope.m4a
File not found at:
/Users/HBrazee/Music/Jerome Kern/Show Boat/05 Cap'n Andy's Ballyhoo.m4a
Then I hit [Cancel]
(!) Moonlight Sonata points to file:///Users/HBrazee/Music/Music/A-M Classical/Unknown Album/Moonlight Sonata, movement 1 1.mp3
Searching, I see that my hard drive does not have a file containing "Moonlight Sonata, movement 1" in its name. I may have lost that song altogether. I don't know how many songs I have lost.
So I ran the script again, selecting the 539 of 13,440 items with Artists starting with "A". I pressed "OK" 7 times before getting a script error that is too big to fit here. The script error starts with this:
Can’t make «class pLoc» of item 119 of {«class cFlT» id 65225 of «class cUsP» id 65222 of «class cSrc» id 63 of application "Music", «class cFlT» id 65226 of «class cUsP» id 65222 of «class cSrc» id 63 of application "Music", «class cFlT» id 65227 of «class cUsP» id 65222 of «class cSrc» id 63 of application "Music", «class cFlT» id 65228 of «class cUsP» id 65222 of «class cSrc» id 63 of application "Music", «class cFlT» id 65229 of «class cUsP» id 65222 of «class cSrc» id 63 of application "Music", «class
and ends with:
«class cSrc» id 63, «class cFlT» id 65559 of «class cUsP» id 65222 of «class cSrc» id 63, «class cFlT» id 72458 of «class cUsP» id 65222 of «class cSrc» id 63, «class cFlT» id 65560 of «class cUsP» id 65222 of «class cSrc» id 63, «class cFlT» id 72459 of «class cUsP» id 65222 of «class cSrc» id 63, «class cFlT» id 65561 of «class cUsP» id 65222 of «class cSrc» id 63, «class cFlT» id 72460 of «class cUsP» id 65222 of «class cSrc» id 63} to text