my %adv = (
            '22' => { filename => "adv22.txt",
                      message  => "Text for error code 22" },
            '24' => { filename => "adv24.txt",
                      message  => "This about error 24" },
            '50' => { filename => "adv50_and_52.txt",
                      message  => "Text for error 50" },
            '52' => { filename => "adv50_and_52.txt",
                      message  => "This is about error 52" },
            '79' => { filename => "adv79.txt",
                      message  => "Special text for code 79" },
           };
}