Attempt to add part at undefined sensor 1 on conveyor coneyor001？

dd13616

Attempt to add part at undefined sensor 1 on conveyor coneyor001是怎么回事？
4 I6 ~9 M8 ^( k* J" J
. A( S$ v! k, M- J! Q) d+ pconveyor元素的input rule：
if nparts(coneyor001)<5
pull from buf1 with labor1 using path
! d" H) y+ k& y" aelse
wait
2 a3 T' Q5 d" K$ y+ F# \endif