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，
$ b( }5 j" z9 {- V, I5 W5 S1 J" q7 I" L  f$Title A Investment Problem
$ontext
; D& L0 o/ G# n- j" Cthis problem finds a optimized investment that meets
requirements in the city
$offtext
. J* E' ]6 M6 ~$ U& k* A5 C" gSets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
7 o* l- |; j, s" G& F8 Z7 JParameters
    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
        plant-2  7
9 B! s* J5 @* k4 k        plant-3  16
        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
9 {) b; O5 [3 [% c       /mode-1  3
( q" j- t8 W2 a8 W' X( ?4 O) V& g        mode-2  3
        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
                 mode-1   mode-2   mode-3
* l1 X+ i1 {( n; w( U$ g" ]        plant-1   0.4      0.24     0.04
5 T, b3 l" M+ W8 V: Z4 V0 b4 `        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/
0 C- _% R' D: ?' j# I. |4 c9 U       b the minimum tatal investment budget of the four power plant /120/;
Variables
! ^- @% I6 h" G9 p$ ]% E       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
, g" O6 _6 B/ K: c( ]! \       z the total cost of the four power plant;
Positive Variable x;
4 W  x" \2 v7 ?) N3 UEquations
* `5 _# v$ {* h# ?- V       cost           define objective function
       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
# z/ d7 E3 Q; L3 V       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));
capacity1(i)..    sum(i,x(i)) =g= m;
& T* b8 ]  J+ x$ Y: `( Nbudget(i)..       sum(i,c(i)*x(i)) =l= b;
capacity2(j)..    sum(j,y(i,j)) =l= x(i);
. d& q% ~" V" @" Wdemand(i)..       sum(i,y(i,j)) =g= d(j);
, @! h$ a  s( O! T: XModel investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

9 M4 L4 B) M  r/ Z运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！