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？
; C- l, ~8 `0 _% K7 Q
) Q. Z/ d' S, Uconveyor元素的input rule：
) H9 z4 j- v) q1 [$ {if nparts(coneyor001)<5
pull from buf1 with labor1 using path
else
wait
endif