Am slowly working through the suggestions given,Much appreciated.As i said previously I am new to Perl. I am trying ti use the NMAP::Scanner module but get the following error when trying to execute the code: Can't call method"as_xml" on an undefined value at c:/Perl/site/lib/Nmap/scanner/Backend/results.pm All help greatly appreciated.Code is found here: http://search.cpan.org/~maxschube/Nmap-Scanner-0.9/lib/Nmap/Scanner.pm#SYNOPSIS