my $twig1= XML::Twig->new(    
	twig_handlers => { 
		'Parameter' => sub { 
			local $, = ",";

			my $item = $_; 		# copy "original" $_ to $item; because map uses $_ as well
			my @names = map { defined ? $_ : 'fault' } $item->{'att'}->{'name'};

			print $FhResult @names, "";
		},
	},
);