模拟出错，请教高手~~急

hln6610320

模拟时
     obj.move(pos1);
3 y! H) G+ _# D  j% K" g这句老出错，但不知错在哪 ，请教高手~~~
+ D2 A7 b$ |* O, D: g) i" h; g还有就是装卸站transferstation 的methods初始程序看不懂，
1 V5 _/ m* c5 o: L, d" Qi : integer)
-- @ : waiting Target
-- ? : TransferStation
is
do
if i = 1 then
, a1 Y/ W2 \. U1 x/ r) K# m7 W  -- before starting the transfer to the TransferStation
+ F0 j* u9 O$ M  -- parts/target are ready
& o7 l! B4 q4 e elseif i = 2 then
' q$ Z4 |* \' a: N' G& Z  -- before parts leaving the TransferStation
! Z6 {  F4 D2 g4 v) o. g/ L end;
5 M: D2 h- \& F% Q, S' M+ t& R' {end;
如果要设置有条件的卸载，当物件属性integer满足一定数量条件时卸载，应该如何编写？