/bump
I've received a mail with a workaround for this problem.
Problem was the BIRT_VIEWER_WORKING_FOLDER - Variable in the web.xml. As long as it contained the {birt-home}-var i've got links that showed up like:
http://localhost:8080/birt/frameset?...ingleErrorType.
The workaround is only a partial solution as i want to store my reports packaged in the birt-deployment.
Greetings and Thanks,
Tobias