Hello, Just want to point out that icode_range option is repeated in both o2 and o3 (which includes o2) when you run hipe:help_options(). o2 = [icode_range|_] ++ o1, o3 = [{regalloc,coalescing},icode_range] ++ o2. I'm guessing this isn't on purpose. -- Loïc Hoguin Erlang Cowboy Nine Nines http://ninenines.eu