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，
$Title A Investment Problem
& H/ R4 t" b1 q$ m$ontext
this problem finds a optimized investment that meets
requirements in the city
4 P7 B7 i% X  z7 Y$offtext
9 P1 ]3 X9 T6 O0 gSets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
4 V' w- [% m- g$ M# Z* D* |    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
. C" E6 s# w& u! r/ W        plant-2  7
6 H) J, N# I& R3 z; P        plant-3  16
        plant-4  6/
. {* {/ S- ?1 P8 N) R4 {    d(j)  the electricity demand for power plant i in cases
" j9 G' g, T: h4 w7 N       /mode-1  3
        mode-2  3
! a) h& ~# F8 N" C" O& }        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
8 W/ _1 c0 _- u, l- i3 B$ D        plant-3   0.32     0.192    0.032
        plant-4   0.55     0.33     0.055;
2 v5 `; A: m0 f& L% z3 Q' xScalar 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
       x(i) the installed capacity of the i power plant in cases
! X) n5 A8 }" l* |/ l, e       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;
Positive Variable x;
" Z3 g  j: B+ P& mEquations
       cost           define objective function
' \( I3 S7 s) `5 t7 g       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
/ X: `& o0 f: J3 T0 J       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
1 @1 l$ ~8 ?4 jcost..            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;
: o" ]# f: }1 k- e' y$ ~budget(i)..       sum(i,c(i)*x(i)) =l= b;
3 d/ e/ n1 D7 J' c, qcapacity2(j)..    sum(j,y(i,j)) =l= x(i);
demand(i)..       sum(i,y(i,j)) =g= d(j);
" j& y6 Z! `6 f' Y3 TModel investment /all/;
Solve investment using lp minimizing z;
4 l: E- k0 P4 P' u# l$ U+ X& I: KDisplay y.l, y.m;
/ `6 z% d7 O$ A6 y3 ?
运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！