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？
. s9 F4 Y2 S6 T% Z5 [& q
conveyor元素的input rule：
& E; ~! T0 o: {: j1 _if nparts(coneyor001)<5
pull from buf1 with labor1 using path
else
: n2 T' j* G1 I  T% D; J( Y1 }wait
endif