hi, thank for the work, the sintax for subind seems not work on Ti-89, do you know if it work only with v200? I use hibwiew ver 1.0 to open the file on the calc EDIT Opps my fault, i reset the calc and i install an older o.s version, 3.01, instead the 3.10...whit the latest o.s the subind work perfectlyby Rob85 - WordRider General