.\rooms.lua:567: attempt to call a nil value
stack traceback:
.\rooms.lua:567: in function 'length'
.\rooms.lua:657: in function 'process'
.\rooms.lua:805: in function 'lookPath'
.\rooms.lua:896: in function 'getPath'
.\lujing.lua:1637: in function <.\lujing.lua:1625>
(tail call): ?