Anyway, I'm at the part where I have to go to vault 112 and still no distress call from Amata. I thought I was supposed to get one at the purifying center. Any idea on this? Am I just expecting it way too early or did i miss something?
By the way, do you have to stay on one side of your karma to keep your companion?
I got the distress call sometime after escaping from the Jefferson Memorial. When you get the call, sabotage the vault's reactor to force everyone to leave. Butch will then be in the Lower Deck bar in Rivet City. He'll join you if your Karma is in that neutral range (About -250 to +250).
Hope that helps. --- Thus was the gospel, according to Remag.