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？
$ Q2 C6 l: C! E9 h6 E; P
5 r6 }' m" H; [0 o7 T, _conveyor元素的input rule：
if nparts(coneyor001)<5
& U! L9 g: h# ]1 r7 y4 T  }& Gpull from buf1 with labor1 using path
else
wait
endif