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 V6 [8 C# V! j
conveyor元素的input rule：
if nparts(coneyor001)<5
! p0 P2 l+ T( l) X: Q" {# Bpull from buf1 with labor1 using path
else
* q) f. E6 m, J. @. b% B- |wait
8 f' Z: a# u( F- R( e! dendif