Did they remove this function? I'm just wondering because it keeps returning nill to me. Is there any alternate method of getting this information?
Whether or not it works I do not know. But I can tell you it has not been removed, it still exists in the global table _G. It did return nil to me as well when I tried it.
I do not know how it works, my guess would be
?do you have to be in a raid group for it to work?
I do not raid, pvp, & rarely group, so this may be wrong, but I googled "how to create a raid group" and what I read said when you add a 5th person to the group the game will ask if you want to convert the group to a "Large" group. I'm guessing you must be in that "Large" (raid) group before the function will work. Try creating one and then test the function.