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 {, M( X) N: F" a$ ?5 a7 I
# q2 F% ~2 p; m, ^conveyor元素的input rule：
if nparts(coneyor001)<5
: e$ `) ^' C( k8 l& z: Zpull from buf1 with labor1 using path
else
wait
endif