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？
7 v! B) |: {  G. b
1 G; ~8 X: i" A9 d9 @conveyor元素的input rule：
if nparts(coneyor001)<5
pull from buf1 with labor1 using path
else
wait
* R$ `& W3 {1 T9 q: aendif