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，
  o! F( {: t, {3 x$Title A Investment Problem
$ontext
& c3 G( ]; w) b  @1 X/ [6 Mthis problem finds a optimized investment that meets
requirements in the city
: M% R8 [& v9 D; P7 l4 N$offtext
Sets
  M4 j5 y& @( M) p    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
1 y+ _  z, w  y8 A: r4 e! W9 X4 IParameters
    c(i)  the unit installed capacity of power plant i in cases
2 p8 P3 k! F* t2 P/ q       /plant-1  10
        plant-2  7
' s# Q$ K  l. @0 H        plant-3  16
        plant-4  6/
- d) j1 f, H3 K: x5 ?; `    d(j)  the electricity demand for power plant i in cases
; b" K4 s. P& N       /mode-1  3
        mode-2  3
        mode-3  2/;
& G! b4 R3 x  @/ ATable f(i,j) the unit operating cost of each power plant
6 V$ I# e0 ]: O) V4 T+ }                 mode-1   mode-2   mode-3
: d6 s. c' L/ W        plant-1   0.4      0.24     0.04
; N, s# X) L* A- g* `" {+ i        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
/ N2 }. c* P5 v       b the minimum tatal investment budget of the four power plant /120/;
, L; _: C2 M0 h8 `0 [  YVariables
       x(i) the installed capacity of the i power plant in cases
# Z3 z8 _: t  X, B       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;
Equations
       cost           define objective function
9 Y  @  Q7 `/ e9 `; b( z5 a9 v# W       capacity1(i)   observe total capacity linmit at plant i
) M1 I( Y1 W7 v4 r! g  g+ G       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;
( ?) j5 f1 n- f- Z3 ?$ J$ f" {cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
  n+ J" L( v& S# Vcapacity1(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);
7 R( M  G" u, b( d7 N- K# Bdemand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

2 ^4 D: x& z) b" z1 x运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！