Thanks for the replies.
Neal,
The Z is where the project is located. It’s a mapped drive, I use BTS2004 in a VPC image since BTS2006 is installed on my laptop.
Greg,
At this time I just validated the document from Visual Studio.
However, I deployed the schema (using default XMLReceive pipeline) and this works without problems!
Strange that Visual Studio behaves different from the actual implementation.
Thanks for you help,
Dirk