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？

4 S% n* C" h$ X# p, D# W! _conveyor元素的input rule：
( {* N$ x" C- R: t9 sif nparts(coneyor001)<5
pull from buf1 with labor1 using path
4 f, N7 f$ ]0 w  helse
+ y% Q# Y: j. }: w; v/ b' e+ o* ^wait
6 b; r7 l; O: M. N. A& Uendif