Thank you for your answer! the message that gives as result is 0, successful completion so that point wouldnt be the problem sorry if my english its not good (i speak spanish!) thanks! -- View this message in context: http://r.789695.n4.nabble.com/BFGS-and-Neldear-Mead-tp3388017p3393173.html Sent from the R help mailing list archive at Nabble.com.