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！！！
我把程序贴在这，
$Title A Investment Problem
$ontext
this problem finds a optimized investment that meets
requirements in the city
$offtext
Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
0 J/ q: i4 S& j  c4 n    j  operating mode  /mode-1, mode-2, mode-3/;
' h0 t: L6 q. W2 ?3 XParameters
- p$ W5 A4 V) ^  {' \5 B    c(i)  the unit installed capacity of power plant i in cases
! }6 _# A% }- `2 u       /plant-1  10
2 I/ P2 k- ^6 q- J1 l& P        plant-2  7
, _, Q. v7 W! f6 O7 }: d        plant-3  16
8 |4 q5 N1 h4 L  }6 c/ h/ k: e        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
( ^% A0 @0 z3 I* x' t, w       /mode-1  3
        mode-2  3
5 f  Z% p3 V  I2 X& c        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
8 ^& N" ^) c1 i, W! l( d& d8 l                 mode-1   mode-2   mode-3
# j+ W" u  [) i% o  n# n7 l4 ^        plant-1   0.4      0.24     0.04
        plant-2   0.45     0.27     0.045
' d5 W( |3 P& K        plant-3   0.32     0.192    0.032
- k( G2 ?6 T. ~- h4 j5 S' T8 ^: `        plant-4   0.55     0.33     0.055;
2 v. N- B- |- r" tScalar m the minimum total installed capacity of the four power plant /12/
+ N* u: a2 H: ~4 k       b the minimum tatal investment budget of the four power plant /120/;
( j) ?2 u" q9 x6 ~7 dVariables
$ W) b2 i" f1 h" |" C7 M       x(i) the installed capacity of the i power plant in cases
, Y4 I* i0 l/ |' m' W$ U9 Y3 K! W       y(i,j) the operating lever of the i power plant under the j operating mode
       z the total cost of the four power plant;
Positive Variable x;
. v3 C' l" E. W# {* [( M7 f& D+ kEquations
       cost           define objective function
4 S* D+ {) [. b1 @. I+ |       capacity1(i)   observe total capacity linmit at plant i
& k  J5 t9 e9 ^( E) k       budget(i)      observe total investment budget limit at plant i
; m. A0 C  r& C% n: K9 v       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
4 J4 J9 b3 n* C* Y: z0 L% Tcost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
5 R  j8 r: h$ d/ _) ~capacity1(i)..    sum(i,x(i)) =g= m;
budget(i)..       sum(i,c(i)*x(i)) =l= b;
capacity2(j)..    sum(j,y(i,j)) =l= x(i);
; K8 J: i: k+ x3 zdemand(i)..       sum(i,y(i,j)) =g= d(j);
% c3 L$ g7 J0 ]' d; RModel investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

( [; ^* F& c# `2 |! b1 G运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！