With this script you can find missing files in your playlist. (Files that doesn’t exists anymore, or has been moved)

Set fso = CreateObject("Scripting.FileSystemObject")
 
For Each track In playlist
	If fso.FileExists(track.Filename) = False Then
		MsgBox("File Not Found: " & vbNewLine & track.Position & ". " & track.ATFstring("[%artist% - ]$if2(%title%,$filepart(%filename%))"))
	End If	
Next
 
quit