Hi Andy,
The exception disappears when reverting the changes in 
company/package-standard.orm. Maybe the JPOX orm metadata parser does 
not yet accept the  definition.

Doesn't yet accept *what* definition ?
The mailer must have skipped it: the definition of the element interface. I had put it in angle brackets which is not a good idea when using a html mailer.

The log always tells you what is parszed and what isn't and if any errors are
I attach the junit test output (derby-app-sometests-junit.txt) and the jpox log (derby-app-sometests-jpox.txt, I skipped a couple of messages, because the apache mailer does not accept mail over 100K) below. Maybe the memory result of the parsed metadata element does not have the expected class.

Regards Michael

Michael Bouschen		Tech@Spree Engineering GmbH
mailto:mbo.tech@spree.de	http://www.tech.spree.de/
Tel.:++49/30/235 520-33		Buelowstr. 66			
Fax.:++49/30/2175 2012		D-10783 Berlin