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！！！
+ }5 U/ G. y. z7 i) C1 c$ y我把程序贴在这，
6 D$ c% x2 v6 B2 @: r$Title A Investment Problem
( w! V  L7 {1 o6 L$ontext
7 o1 J9 g4 J+ g$ f' R$ P, fthis problem finds a optimized investment that meets
requirements in the city
$offtext
Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
    c(i)  the unit installed capacity of power plant i in cases
' l3 C2 I6 M2 F+ ]4 i9 Z$ X8 r# b       /plant-1  10
' O8 X; J$ b9 p0 E2 v) F        plant-2  7
8 {( X; X' K5 ?1 O2 U% j/ ?: K        plant-3  16
        plant-4  6/
( ?+ L5 L) G* F/ n. E    d(j)  the electricity demand for power plant i in cases
1 Q& j/ Y3 b; T+ }3 \  o       /mode-1  3
        mode-2  3
        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
) Q% ]/ P+ R' B/ c1 G' q% q/ _                 mode-1   mode-2   mode-3
8 S9 `' V/ r) N        plant-1   0.4      0.24     0.04
4 T9 K8 f. G9 c) u. f* P        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
% p- h0 h8 C# f* g% f8 x) |        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
( T! R% h+ J7 h/ v       b the minimum tatal investment budget of the four power plant /120/;
$ v" ?7 |% G" D& O4 d4 O2 TVariables
       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
( u  L/ q. y2 H6 c$ y       z the total cost of the four power plant;
Positive Variable x;
( Q( g$ g) L9 [1 mEquations
. W* t( ^6 J, Y2 v/ R       cost           define objective function
       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
       capacity2(i)   observe installed capacity for each power plant
$ G, O5 H' j% M" L' v       demand(i)      satisfy the electricity demand under each operating mode;
, N- s4 ^8 w# M+ |$ \cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
! v% w" e: Z/ l* i! d, `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);
demand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
" P1 h  ?4 v, x8 u6 m6 x1 `4 }  qSolve investment using lp minimizing z;
2 x4 F  q. G5 {: Z; ODisplay y.l, y.m;

运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！