Octal constant (Ex.: &O14 = 12 decimal) It accepts 8 as a digit. D'oh. Try "PRINT &O18" in a CoCo 1 or CoCo 2. Without having a CoCo3 at hand to check I'll wager it patches that bug. All it has to do is replace a LBHI with a LBHS. Juan Castro Enviado do meu Olivetti Programma 101 http://retropolis.com.br