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？
" T5 @( \! i) D/ R6 |/ w
* i8 W( P( x9 I" J' S9 M- dconveyor元素的input rule：
if nparts(coneyor001)<5
  I  m6 V) {1 mpull from buf1 with labor1 using path
* b1 Y: L/ E9 K! velse
wait
5 S- y( f, B' E' K/ Xendif