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？

5 Q! k, ~8 S4 l% W. b! ^1 \; u' ]conveyor元素的input rule：
  J) b& s6 L5 c' t/ Qif nparts(coneyor001)<5
pull from buf1 with labor1 using path
4 `, H' [, v* `; ^) welse
8 w2 N) w5 p* n* }, p9 y) J& }wait
endif