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，
( z- e2 |( k4 b$ J' M: _9 \$Title A Investment Problem
$ontext
this problem finds a optimized investment that meets
requirements in the city
3 s5 F" Z  a) z1 f" f) p7 g& s$offtext
Sets
' O; P3 a8 t+ y4 M7 U    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
, s9 b, j7 m0 MParameters
    c(i)  the unit installed capacity of power plant i in cases
, g, m* ]2 Z% O" w, W) l7 T: R       /plant-1  10
1 q% q1 n# S+ W" o' D) t! i4 `        plant-2  7
        plant-3  16
        plant-4  6/
1 j7 t' `# n0 P! J    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
        mode-2  3
8 I  n8 A# S/ Y  F3 L4 ~' ~        mode-3  2/;
) x0 |6 R. Q0 tTable 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
+ x4 V) I8 Q' {' H- o7 H        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
5 @  e4 m9 l3 Z' J, V: @8 |7 m        plant-4   0.55     0.33     0.055;
3 s/ D! h8 s& v( \* L$ Z( U* ~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/;
) Y* n' S+ T' JVariables
       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
       z the total cost of the four power plant;
4 B% V$ T. V3 Q$ _3 t: IPositive Variable x;
$ e# g+ l+ c) e9 }7 oEquations
       cost           define objective function
; M2 o6 Q" i5 m& c2 d. C( s1 ?4 E       capacity1(i)   observe total capacity linmit at plant i
# K1 ]: M) ]5 V  S( q: \  k# B       budget(i)      observe total investment budget limit at plant i
       capacity2(i)   observe installed capacity for each power plant
7 b. T- U/ V) j- p3 G  Q       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;
) w2 U+ d9 S) ]" [: Pcapacity2(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;
  ?( Q  C9 k2 L& z9 T1 vDisplay y.l, y.m;

- p- y4 Z; ?) ?5 B2 i0 |' Q% T( o! M运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！