Thanks for pointing out. I really don't go though such testing before. I got following error for test case you mentioned: 
ok 1 - use XML::Schematron;
ok 2 # skip XML::XPath not installed
ok 3 - 'Schematron instance created' isa 'XML::Schematron'
Could not create file parser context for file "t\data\order.scm": No s
+uch file o
r directory at C:/strawberry/perl/vendor/lib/XML/LibXML/SAX.pm line 10
+1.
 at C:/strawberry/perl/site/lib/XML/Schematron/Schema.pm line 44.
# Tests were run but no plan was declared and done_testing() was not s
+een.
# Looks like your test exited with 2 just after 3.

[download]
XML::XPath is not installed. I will install it and lets see what happens.

Update:
After installing XML::XPath and running same case again following error: 
ok 1 - use XML::Schematron;
ok 2 - 'Schematron instance created' isa 'XML::Schematron'
Cannot open file 't/data/order.xml' at C:/strawberry/perl/site/lib/XML
+/XPath.pm
line 53.
# Tests were run but no plan was declared and done_testing() was not s
+een.
# Looks like your test exited with 2 just after 2.

[download]

Update 2
cpanm --test-only XML::Schematron::LibXSLT gives following output 
--> Working on XML::Schematron::LibXSLT
Fetching http://www.cpan.org/authors/id/K/KH/KHAMPTON/XML-Schematron-1
+.09.tar.gz
 ... OK
Configuring XML-Schematron-1.09 ... OK
Building and testing XML-Schematron-1.09 ... OK
Successfully tested XML-Schematron-1.09

[download]

In reply to Re^4: Validating XML file with XML::Schematron::LibXSLT by hiruzen
in thread Validating XML file with XML::Schematron::LibXSLT by hiruzen

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