Quote Originally Posted by 'Ken',index.php?page=Thread&postID=144724#post1447 24
When you have a player in your team, but this player is not online, then you get a lot of warnings on the other characters that this player does not exist. The warning messages are system messages(yellow) in the main chat log.
At this point I solve it by unchecking the checkbox of a character when he's not in my team, but it would be awesome if you could somehow implement a "Exists" validation before trying to send stuff to a character.
I had a system to do this in place in the very first release of Jamba. It worked fine for some users (including me) and other users couldn't even play the game (see the first two pages in this thread). The system used the friends list to see if the character was connected. T've since tried to find out if a character exists or not with other methods. There is a wow API command called UnitExists, but it only works for party/raid and potentially characters you have interacted with. I know its not good enough for Jamba's purposes, so you are stuck with disabling offline characters.