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？

conveyor元素的input rule：
' I4 s" r: ?% z& ?/ |6 [if nparts(coneyor001)<5
9 A$ v3 r/ H. ]; R! I5 h- Lpull from buf1 with labor1 using path
else
7 V: G9 X, B$ P: u4 fwait
endif