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！！！
6 ?0 m& `; d8 o! k我把程序贴在这，
$Title A Investment Problem
4 L( k1 q2 }  w& U+ k0 U$ontext
this problem finds a optimized investment that meets
requirements in the city
8 ^6 A7 n+ u  O; d* ]# I, O' ^$offtext
" w* g- `+ k7 `% nSets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
0 Z! @+ E5 m# U3 S; n8 IParameters
6 \: \. B4 }2 T" q    c(i)  the unit installed capacity of power plant i in cases
' M' c8 b2 v1 n$ T6 i       /plant-1  10
4 a2 T$ U/ A" U  Z9 R0 n        plant-2  7
7 j, a: n5 Y( d- i        plant-3  16
$ |4 F$ i* B9 v) I. g6 }3 X        plant-4  6/
3 D/ I8 M7 y  ]: y) f    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
        mode-2  3
        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
2 \3 I0 q$ n3 Y3 a0 l1 o+ d7 ]: a                 mode-1   mode-2   mode-3
        plant-1   0.4      0.24     0.04
" H* Q  h$ u0 i# g9 _        plant-2   0.45     0.27     0.045
+ T: t  ~1 M7 X5 d4 q: R        plant-3   0.32     0.192    0.032
4 [- d5 w% d  d: o; W7 |        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
       b the minimum tatal investment budget of the four power plant /120/;
  f/ }0 a  u  d1 I7 SVariables
& r( J! L" g& G       x(i) the installed capacity of the i power plant in cases
4 p# k6 M0 `7 o4 e/ P) m1 L  g& L       y(i,j) the operating lever of the i power plant under the j operating mode
9 v/ o- h5 O* I       z the total cost of the four power plant;
2 [7 L( {+ Y) Z6 [( e. ePositive Variable x;
) P4 Y+ B1 _- ]- u! y' ^Equations
       cost           define objective function
       capacity1(i)   observe total capacity linmit at plant i
. y, q6 u+ a2 u+ q  ]9 s( d; F$ U       budget(i)      observe total investment budget limit at plant i
       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
" N4 L8 o" @7 _2 r' V& ^- xcapacity1(i)..    sum(i,x(i)) =g= m;
budget(i)..       sum(i,c(i)*x(i)) =l= b;
# u& w% W/ m9 H0 e% d* M/ h1 acapacity2(j)..    sum(j,y(i,j)) =l= x(i);
demand(i)..       sum(i,y(i,j)) =g= d(j);
& l6 E6 G9 f, uModel investment /all/;
; E6 E' R5 h% n$ y3 uSolve investment using lp minimizing z;
: [+ [6 b/ k/ C/ hDisplay y.l, y.m;

运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！