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？

conveyor元素的input rule：
5 G) |/ v- k$ j$ ?/ R" J* Qif nparts(coneyor001)<5
: A$ @/ s/ j! i+ J- u3 ?pull from buf1 with labor1 using path
4 T) ]8 l2 Z$ O1 C2 kelse
/ [% b2 {7 C& W$ R9 iwait
6 z( [0 U8 G& M% ?3 oendif