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！！！
  O/ \. h3 y. [; t我把程序贴在这，
3 \% a: [& z3 z- J$Title A Investment Problem
$ontext
5 I8 K- @) z8 g0 _  m  N0 A5 _/ uthis problem finds a optimized investment that meets
requirements in the city
7 P+ d' c1 c$ P  X1 w2 m6 G$offtext
. E/ g( `. C$ HSets
8 x+ Z1 O0 Z/ [; b$ d. F+ i  m    i  power plants  /plant-1, plant-2, plant-3, plant-4/
- E+ R2 v8 k3 b  K    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
        plant-2  7
/ c, u3 c  }0 @4 i. H        plant-3  16
/ e' L) C, W4 f. `( R        plant-4  6/
( w" u. N5 A7 R! N% Q0 w& v3 N    d(j)  the electricity demand for power plant i in cases
# m6 B) v7 v) K9 t6 {5 Y6 H0 D% V, ]       /mode-1  3
# Z3 D, F8 ^% x- [0 _        mode-2  3
        mode-3  2/;
Table 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
        plant-2   0.45     0.27     0.045
1 U# V; z" X- a! s/ J' [        plant-3   0.32     0.192    0.032
8 Y  T- l# r9 |: T) A0 G  f! X        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
4 L: k2 J: r2 @7 L) {: v       b the minimum tatal investment budget of the four power plant /120/;
Variables
0 z  |: ^; {0 o$ w: `. V9 a       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;
! H1 m3 y* {- m, W8 o3 rPositive Variable x;
0 X9 U  p6 `. ^: S6 ^- ^& E% sEquations
9 c5 V0 F/ |7 ?, t7 b  ~- a       cost           define objective function
. o$ V9 H  O# @; a5 i8 s+ o       capacity1(i)   observe total capacity linmit at plant i
: f" k! M& d( _, \: l0 Z       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));
5 J- \0 k& q- t* Q5 h( Q! 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);
2 [  M7 P) Y2 @  U2 Qdemand(i)..       sum(i,y(i,j)) =g= d(j);
  V7 o+ W: N4 w- ^. o3 ?2 T# TModel investment /all/;
Solve investment using lp minimizing z;
2 v/ b7 v- S1 C, v0 dDisplay y.l, y.m;

( c6 S  A+ f9 F1 ?) F运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！