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？

6 f( a& o7 X2 _: l# Dconveyor元素的input rule：
if nparts(coneyor001)<5
2 |9 d" v7 {3 D. V* i3 F% v& c$ Qpull from buf1 with labor1 using path
3 F' P+ t- ?  R7 f$ r' J. d" gelse
1 y' I1 y7 B* {* U( Y2 J, ewait
4 J, `% k0 Y5 ?, ]6 w% ]endif