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：
3 O+ d8 e" H/ ?* Aif nparts(coneyor001)<5
* @( W+ x* N$ c! d1 Y% Q3 B+ \pull from buf1 with labor1 using path
# E- u$ t: w+ S  N+ y" _else
: P+ s) P- E- r3 U) S6 x, pwait
endif