Hi,
I have the same problem in our integration system but it works in our development system.
I have checked the customizing in IBO_C_WF* tables and launchpad MSS/NAV but there is no difference between both system. In our development system, when I'm clicking on the details button, it opens the application in a new window. But in our integration system nothing happens while the debug of the event_handler method gives the same result.
Did you find a solution?
Thank you in advance.