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？
9 N1 Y+ N$ |  m& I- O- ]7 l
conveyor元素的input rule：
4 v& R. |. G; kif nparts(coneyor001)<5
* c: d2 ?6 Y( ^+ ]5 D8 bpull from buf1 with labor1 using path
* L! B/ j- R! H% T! C7 Q  \  {' melse
) l" [( s0 U5 c& o5 T% A' Rwait
endif