A very simple script, almost out of the documentation:

#! /usr/bin/perl -w

use strict;
use XML::LibXML;

my $doc = new XML::LibXML;
$doc->parse_file('stsdef.xml');
my $rng = new XML::LibXML::RelaxNG(location => 'stsdef.rng');
$rng->validate($doc);
[download]

At first it complained about syntax errors in the RNG file, but once I got those cleared up I got this instead: XML::LibXML::RelaxNG::validate() -- doc is not a blessed SV reference at rng.pl line 9.

That's not a message I've had any luck finding a meaningful explanation for. Is there some prerequisite step I'm missing here?

Thanks!