Missing songs in iTunes Playlist
ProSelect version 3.3.4 now removes any songs from the selected playlist which are not found in the location specified on your hard disk. This is usually because the songs have been moved or deleted after adding them to iTunes.
You can check any missing songs by double-clicking on them in iTunes which will report an error if they are missing.
You can check any missing songs by double-clicking on them in iTunes which will report an error if they are missing.
KnowledgeBase Article: Missing songs in iTunes Playlist