xsd catalog support in FM9/10

Hi (after a very long pause),

I'm trying to get FM 9's parser to validate XSD-based DITA 1.2 topic. The schema declaration looks like:

<topic

id="topic_y13_nx4_h2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:noNamespaceSchemaLocation="urn:oasis:names:tc:dita:xsd:topic.xsd">
<title>Topic...

and I have declared structapps to use DITA 1.2 catalog.xml that specifies:

<group xml:base="technicalContent/xsd/">

<!-- Topic for use in the technical content package -->
<system systemId="topic.xsd" uri="topic.xsd"/>
<system systemId="urn:oasis:names:tc:dita:xsd:topic.xsd" uri="topic.xsd"/>

after all kind of fiddling..i alwaýs get parser error:

Error in file C:\<path_to_instance>\topic.xml. Could not open schema file urn:oasis:names:tc:dita:xsd:topic.xsd.

BR, Martti