关于GAMS的问题，小弟询问咯？？请大侠释义…………

随墨枫飞

非常感谢亲！！请各位一定帮帮忙！！学期作业啊！！！
2 H. s+ K7 u( v4 F我把程序贴在这，
! ~% ?  f& e4 a1 v: T$Title A Investment Problem
! {- k* e3 }8 b- V, _. ]( B2 \1 V, I$ontext
3 n5 h; O  H; V0 h& {; ythis problem finds a optimized investment that meets
1 @* C% N* x; \: g* m( X3 E3 prequirements in the city
* A6 E* p, N' K) a6 s$offtext
Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
- l2 l; S% d: L) I    c(i)  the unit installed capacity of power plant i in cases
: A" Z4 m! |9 z. K) `2 x* C       /plant-1  10
+ ^1 j) c9 d3 P5 U; K2 j9 C        plant-2  7
  [0 w0 L$ H( V1 v: B        plant-3  16
        plant-4  6/
" y# B9 [) q% X0 `5 g8 V& g/ J    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
        mode-2  3
) \3 h" W! G# U+ v        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
                 mode-1   mode-2   mode-3
        plant-1   0.4      0.24     0.04
        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
; M& f4 j4 {# M7 `9 x, z! R        plant-4   0.55     0.33     0.055;
( ~/ k! |+ M2 F! CScalar m the minimum total installed capacity of the four power plant /12/
       b the minimum tatal investment budget of the four power plant /120/;
) Z7 q, @- R/ qVariables
       x(i) the installed capacity of the i power plant in cases
       y(i,j) the operating lever of the i power plant under the j operating mode
& {" d& L+ V6 G7 Q; X       z the total cost of the four power plant;
Positive Variable x;
% n8 U; o2 }* l! t0 rEquations
       cost           define objective function
4 W2 S  v+ D) v       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
' H) v' V% _1 [, A( ]- Q/ |* g       capacity2(i)   observe installed capacity for each power plant
  q' v6 H2 b' c0 e; h       demand(i)      satisfy the electricity demand under each operating mode;
' h* l1 W: L7 t. F1 l$ {cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
capacity1(i)..    sum(i,x(i)) =g= m;
1 p5 w5 k" {0 Zbudget(i)..       sum(i,c(i)*x(i)) =l= b;
capacity2(j)..    sum(j,y(i,j)) =l= x(i);
! x" I9 v) m  P# A0 _# n5 s& q3 Bdemand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;
- L  t2 n# O& Q9 y/ t% D% V/ D
0 Q2 v. H. e/ q. y" E( [% J; ~. a运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！