I would like to be able to detgermine which of my files do not have embedded album art in them. Ideally, I would like to have a column in mp4 that inidcates this. I saw in another thread that it was suggested I create a column with value $covers() to accomplish this. Unfortunately, I can't get this to work as I simply see the literal value $covers(). ANy suggestions on what I am doing incorrectly?