because the 86 uses upper and lower case letters (83 is all upper iirc) you've got to store it as y1 ([2nd][Alpha][y][1]), instead of Y1([Alpha][Y][1]). I'd also recomend moving the store up to the same line as the equation like tom suggested. jack -----------== Posted via Deja News, The Discussion Network ==---------- http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own