On Sat, May 16, 2009 at 12:43:44PM -0700, Steve Davis wrote: } ...from error_logger_h.erl: } io:format(Fd, T ++ S ++ add_node("", Pid), []); } ...possibly it's the ++ appends in those calls not the io:format itself? ... which don't even need to be there! 1> io:format(["foo", "bar" | "baz"], []). foobarbazok -- -Vance