I now understand that the use of 'x' and 'y' as assigned variables is totally removed from J601 ...
domain error: ToTM | y =:arctan(tand 40.5)%(cosd(_75-_73.5)) Pity ... this will make for lots of changes in my older materials. x, y and z are some of the most widely used coordinate markers. David ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
