(Before someone says "There are 100 duplicates of this": I am very aware of it, that many threads are asking this same question. I used the search and read everyone of those threads i found - But no one solved my problem.) Anyone knows how to solve the error "The method getHealth() is ambiguous for the type Player"? I'm pretty sure I use a bukkit, and not craftbukkit build; So I don't understand why this isn't working. (Neither do I understand what is wrong with a craftbukkit build - And yes, I read EvilSeph' Thread.) Kindly regards Solved it: I casted my entity to damageable instead of Player. Is it the wrong way to do it or not? EDIT by Moderator: merged posts, please use the edit button instead of double posting.