I am coding with Perl on a Window 7 machine. I am able to extract data from the XML using the XPath code below

    use strict;
    use warning;

    use XML::LibXML;

    my $parser = XML::LibXML->new();
            my $doc    = $parser->parse_file($newfile);
            my $query  = "/tradenet/message/header/unique_ref_no/date/
+text( )";
            my($node)   = $doc->findnodes($query);
            $node->setData("$file_seq_number");
[download]

However, when i use the same code on a different XML, the xpath from the second document looks as below:

Together with the Perl code, this is what the extraction code looks like:

    my $parser = XML::LibXML->new();
        my $doc    = $parser->parse_file($newfile);
        my $query  = "/TradenetResponse/OutboundMessage/out:OutwardPer
+mit/out:Declaration/out:Header/cac:UniqueReferenceNumber/cbc:Sequence
+Numeric/text( )";
        my($node)   = $doc->findnodes($query);
        $node->setData("$file_seq_number");
[download]

Using the second code, I am unable to retrieve the data from the second XML. I receive this error "Can't call method "setData"on an undefined value at Perl.pl line 5". Does the ":" character in the second XPATH affecting the code?

thanking you all in advance for any advise or help that you may render. Have a nice day!