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？
0 m$ q8 L1 `# c7 y. o! [  l
conveyor元素的input rule：
if nparts(coneyor001)<5
- Y: z) d# O  T" m% l! ^pull from buf1 with labor1 using path
9 }- F5 W- [# g7 U+ telse
wait
endif