The /obj directory contains files required by lib systems. Removing this directory or its contents, or modifying its contents may generate unexpected behavior from your mud. For example, do not attempt to "fix" area_room.c or stargate.c. Trying to load those files in /obj will generate errors because it is *supposed* to do that. Do not try to use these objects directly, and do not copy them into your area directories as templates. QCS uses these rooms in very special ways, and having them in your area directories may confuse it and give you errors you don't understand.