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？
) ^6 [/ e! {" F; K
) E/ T0 B9 e; y, `conveyor元素的input rule：
3 r" `4 _; W' ~1 V4 Y$ Mif nparts(coneyor001)<5
# m( F7 ]" `) p; o- xpull from buf1 with labor1 using path
else
wait
endif