Thank you for the explanation. Now it makes sense to me. It is unfortunate that the same Send to: context menu is used in both the Playlist Editor and the Media Library. I can understand that the command could be useful if there is a very long playlist and a file in a library view is also somewhere in the Playlist Editor's playlist. I remember that the ML didn't exist in the beginning and a playlist could get very long.
In this case, I didn't want to chance trying the command without knowing what it does. I was a little bored and looking for stuff that I have not tried before. I have now tried it in WACUP and Winamp. It appears to be disabled. I have looked thru the Winamp and WACUP preferences and don't see anything related to it. It is not something I would use anyway. I use the Playlist Editor's search feature to look for something in a long playlist.
