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？

conveyor元素的input rule：
  v3 @" E+ i1 n  A1 u8 N8 W: z  T; o6 zif nparts(coneyor001)<5
pull from buf1 with labor1 using path
5 W* F4 J6 P" a0 ]% u; s# ~' U& U! `else
wait
endif