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！！！
% }) N* l8 F& y/ }3 v我把程序贴在这，
$Title A Investment Problem
$ontext
1 `" X! U: k- i. Z( F% |9 ythis problem finds a optimized investment that meets
# A: [! ]$ r. {8 {requirements in the city
1 n, |. L1 x  h, N5 D0 p$offtext
' W+ j3 k3 t) S( g0 fSets
. J- ]* ?* o( D* \    i  power plants  /plant-1, plant-2, plant-3, plant-4/
+ X' d2 V: d2 {+ Q7 D8 z    j  operating mode  /mode-1, mode-2, mode-3/;
$ b/ x' m! Q4 j6 N- fParameters
    c(i)  the unit installed capacity of power plant i in cases
$ J/ S& Q! \1 C. s& K       /plant-1  10
        plant-2  7
        plant-3  16
        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
$ O4 X! M9 _, L- I# B# v. b* y       /mode-1  3
        mode-2  3
        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
; `8 `! Y, y7 x& D  U                 mode-1   mode-2   mode-3
        plant-1   0.4      0.24     0.04
4 n$ a& B1 M6 x% L2 C! E        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
        plant-4   0.55     0.33     0.055;
! {" x4 u, u  B! Q2 l" lScalar m the minimum total installed capacity of the four power plant /12/
       b the minimum tatal investment budget of the four power plant /120/;
$ Q4 |% G7 A! G, ~* N* ?Variables
       x(i) the installed capacity of the i power plant in cases
1 M6 ], f1 g3 f: o/ `       y(i,j) the operating lever of the i power plant under the j operating mode
6 m6 b) P5 C' i) y* b' N       z the total cost of the four power plant;
' Z& r) o* A0 D: k( mPositive Variable x;
Equations
       cost           define objective function
( ~8 y/ H- [8 Y; A9 \+ ~+ R, _       capacity1(i)   observe total capacity linmit at plant i
1 `# y) k0 R5 H# `. r3 H! b       budget(i)      observe total investment budget limit at plant i
! M" u/ j0 p! R& Y. l; G( [       capacity2(i)   observe installed capacity for each power plant
- [/ {2 u$ Y) D2 n: _       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));
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);
demand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

, W3 m' g# \* [; |7 G运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！