Forum:Sargeant RL-3 missing in action?

I need help, i can't find my RL-3 anywhere! i didn't fire him and he dosen't appear when i fast travel to locations. Because of this he's still recognised as a follower even though he's not there so i can't hire anyone else to come with me (besides Dogmeat of course). P.S i've checked canterbury commons, no robot.