It seems that my sensors don't work. I recently tried to scan a facility and got this:
An Error type: Exception with the Message: Argument 1 passed to PositionUtil::isInRoom() must be an instance of Entity, instance of stdClass given, called in /swcombine/http/main/libs/server21/classes/vision/visionClass.inc on line 1830 and defined has occured. It has been stored as Error 27028.
If this bug has not been reported (check first, please), report it to the bugtracker at http://bugs.swcombine.com/