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！！！
( f1 h# [+ f5 ^  m7 f我把程序贴在这，
0 ]: F+ V; `( b! @% \; b$Title A Investment Problem
6 `0 p, g0 d. W% s$ P8 ?$ontext
; q. b# p* y2 T7 z& U6 Y3 |' x/ Rthis problem finds a optimized investment that meets
requirements in the city
1 [" j- W+ p8 ]; |$offtext
, p0 o$ R: Y# |) M. W% l) aSets
+ l# X: z+ b0 q    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
6 n* H, h5 `8 B# ]* D& d* YParameters
    c(i)  the unit installed capacity of power plant i in cases
1 s6 X' P0 a2 h: Z       /plant-1  10
        plant-2  7
# P/ o; p7 y+ D4 p; A1 ~$ q% a        plant-3  16
        plant-4  6/
2 X2 N5 N5 G2 K- P    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
" z' ?0 N$ o4 L& p8 Q        mode-2  3
& s8 d# V. D4 z) p4 N        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
                 mode-1   mode-2   mode-3
; z: J; _4 a* L) P9 Z: F5 u        plant-1   0.4      0.24     0.04
        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
! Z, d  H/ p) N2 V  ^        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
4 ?, Q$ d3 i, A8 H/ w, E. ]+ g       b the minimum tatal investment budget of the four power plant /120/;
4 r: r0 q3 l% Q- BVariables
# j! h1 M  ^! n& X( a2 [1 m, T       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
8 X3 r4 d( k  x% B2 Z' H5 Q; g1 t$ l$ k       z the total cost of the four power plant;
% D# Y8 [' f! Y1 k4 ?Positive Variable x;
5 ^$ D8 A% w2 L. a3 A5 c3 wEquations
       cost           define objective function
6 B% _% C, \* H% ]       capacity1(i)   observe total capacity linmit at plant i
- P$ x2 @6 x. @' W, m       budget(i)      observe total investment budget limit at plant i
. b+ \& h9 O9 `: L. N       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;
8 e; |. P& b+ f& p  Jbudget(i)..       sum(i,c(i)*x(i)) =l= b;
capacity2(j)..    sum(j,y(i,j)) =l= x(i);
3 B- V- U; m0 @4 L+ c# g8 Pdemand(i)..       sum(i,y(i,j)) =g= d(j);
' W( T2 K! M7 w8 FModel investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

8 f0 i) Z, p0 z: @3 i* v$ Y' w运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！