Actually I got it now. Didn't realize that rm_blank is the room that gmlive transports to when a change happens.
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When using room_goto_live(rm_blank) I get an error "No live room was specified". I did all the room setup stuff, but I'm confused as to where to put obj_blank. Should that be in the first room or "rm_blank"? And if so, what layer do we do it? The docs say to remove all instances from "rm_blank".