Hi, I've slightly changed the way the app_server is built. The RUN_WITHOUT_REGISTRAR stuff is still missing though, but a "TARGET_PLATFORM=haiku jam app_server" does work now (from anywhere). Before the change, I could not build the app_server for R5, and it still fails, although the objects are now built correctly (which was not the case due to the drawing/ subdirectory in the path name). I also changed the DISPLAYDRIVER option to be a true compile time option - that way, I could remove parts of the app_server that are (hopefully) not essential for a given display driver. I've not tested this, though. If you have any more suggestions or fixes, feel free to share. Bye, Axel.