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？
) H2 K0 I8 [6 c+ u9 e/ S) a
+ v  ?) e; W8 N8 ~& Gconveyor元素的input rule：
if nparts(coneyor001)<5
pull from buf1 with labor1 using path
; w/ r( |+ H- ?' Nelse
- n; l4 a, {% x, N  Hwait
3 }, a+ ~& I2 @8 d: Uendif