Hi, On the following page: http://perldoc.perl.org/perlrequick.html some cat is misspelled: "cat" =~ /\143\x61\x74/ # matches, but a weird way to spell cat This does not match in ASCII, probably a double typo. Please either s/143/x63/ or both s/143/x43/ s/cat/Cat/ Regards, -DavidThread Next