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：
if nparts(coneyor001)<5
pull from buf1 with labor1 using path
3 G. a) g& _! f9 n' N" Zelse
wait
- K3 ]+ b3 Q9 |, |$ S% E: eendif