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，
* F6 W: h; z1 q$Title A Investment Problem
$ontext
this problem finds a optimized investment that meets
requirements in the city
$offtext
Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
5 R! s+ q2 k9 b$ D0 JParameters
# w/ _4 X0 ~* k; m    c(i)  the unit installed capacity of power plant i in cases
" x  n8 D$ x: _       /plant-1  10
# z+ g, |  d9 \# {- C' H. G- g        plant-2  7
9 [% }) \4 w& M        plant-3  16
        plant-4  6/
; y: f! d0 C& w1 `3 r    d(j)  the electricity demand for power plant i in cases
" ~* c9 x' Q* ]       /mode-1  3
& O: m+ I7 F8 U/ c2 O        mode-2  3
        mode-3  2/;
( H: j  I* H" E6 NTable f(i,j) the unit operating cost of each power plant
/ X8 O, y$ d7 B6 {( C                 mode-1   mode-2   mode-3
        plant-1   0.4      0.24     0.04
        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/
       b the minimum tatal investment budget of the four power plant /120/;
Variables
9 v) P, k! c$ q( b+ ?       x(i) the installed capacity of the i power plant in cases
1 r2 A4 \, Y9 H( y( [; O* G# v       y(i,j) the operating lever of the i power plant under the j operating mode
' S7 Q) K  r0 W1 ]" ^6 H) v" P# j       z the total cost of the four power plant;
1 O$ ^/ \1 C* T5 }0 @9 ~# X& y0 NPositive Variable x;
Equations
* y1 b; _" I: ~+ D       cost           define objective function
9 b; N% L( d  B( J; g, G: J% p0 E       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
/ J3 @/ V" `/ u& Y       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
( W, n2 E8 v/ |6 _! O5 g/ J$ R6 Gcost..            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);
2 G  Q! Z4 \. u4 {9 |demand(i)..       sum(i,y(i,j)) =g= d(j);
0 \& a. Y& _8 I( G. o6 D& N; TModel investment /all/;
& u5 v$ A$ R5 ?3 M0 |Solve investment using lp minimizing z;
' \% X4 R1 A+ \& J9 LDisplay y.l, y.m;

9 d  H, G6 q; U( {: b/ J运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！