I have included the Resizable from DynaCASE-Roassal2-PeterUhnak.156. The class DCTRAnnouncingOverseer does not exist then. All seems to work well.
(as you said, I have also included missing classes).
I have taken the latest roassal in a fresh image and all seems good.
Apparently your changes are not in the DynaCASE-Roassal2 package in the roassalcontrib repo right?