DOCBOOK-APPS: Trouble with Openjade, DSSSL Style Sheets V 1.69,and style-sheet.dtd

Hi!

When trying to create RTF from a DocBook XML 4.1.2 conformant file using
Openjade, I get several errors of the form:

openjade:/usr/local/share/openjade/style-sheet.dtd:11:2:E: unknown
declaration type "element"

My SGML_CATALOG_FILES variable is set as follows:

/usr/local/share/openjade/catalog:/usr/local/share/openjade/xml.soc:
/usr/local/docbook/dtds/sgml/4.1/docbook.cat:
/usr/local/docbook/dtds/xml/4.1.2/docbook.cat:
/usr/local/docbook/style/dsssl/1.69/catalog

As you can see, the dir where style-sheet.dtd is located is included. I'm
invoking Openjade as follows:

openjade -t rtf -V rtf-backend -i rtf95 -d
/usr/local/docbook/style/dsssl/1.69/print/docbook.dsl
/usr/local/share/openjade/xml.dcl <rtf_file>

What's the cause of the error mentioned above?

Thanks for any hints!

Greetings,

	Holger