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？
: a- @" ^0 N7 p* K; G7 {
conveyor元素的input rule：
if nparts(coneyor001)<5
! @7 N  V& {# i4 @. x1 `- C* M& U7 ]pull from buf1 with labor1 using path
) l2 U% y/ T: Y9 i0 f: ^3 Felse
wait
# I4 s; ]& A; X, ]& z0 ?endif