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，
$Title A Investment Problem
; a+ j1 c( V2 J/ Q: Y/ F$ontext
this problem finds a optimized investment that meets
requirements in the city
$offtext
Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
3 I6 d! }3 {: `" A* E    j  operating mode  /mode-1, mode-2, mode-3/;
6 r% Z  S6 e" f0 V6 BParameters
* b' |$ m* E: d9 O3 T' s    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
, \" r( K2 u- g% z! z$ ?2 |( p        plant-2  7
        plant-3  16
        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
! n1 T# \3 x! q        mode-2  3
        mode-3  2/;
" \( r' j5 X4 q* u' V: b/ @$ WTable f(i,j) the unit operating cost of each power plant
                 mode-1   mode-2   mode-3
2 D2 t7 g1 N: W& i1 V4 B' T7 g        plant-1   0.4      0.24     0.04
0 \& p4 j2 g. b& x+ t* V        plant-2   0.45     0.27     0.045
1 [$ H  n! k& Q, X/ ^" ~9 s' u+ C        plant-3   0.32     0.192    0.032
        plant-4   0.55     0.33     0.055;
" z) w( @& m% U! B6 vScalar m the minimum total installed capacity of the four power plant /12/
       b the minimum tatal investment budget of the four power plant /120/;
Variables
" |7 c* f* p( i) T6 N; N       x(i) the installed capacity of the i power plant in cases
% a; f% ~: S# _) ^4 F2 {7 i% d       y(i,j) the operating lever of the i power plant under the j operating mode
       z the total cost of the four power plant;
Positive Variable x;
Equations
+ s( \) g+ A) J9 A1 _- Z- I       cost           define objective function
       capacity1(i)   observe total capacity linmit at plant i
* h8 J; W5 P! ]5 q       budget(i)      observe total investment budget limit at plant i
, f" a; H  F0 j       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
$ u; n2 U  ~& b0 t# `; T9 Scost..            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);
demand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
( G5 H' h2 }, ]1 r( f9 Y* M( eSolve investment using lp minimizing z;
Display y.l, y.m;
1 Z# R# B) ]; l# F
; J8 `5 q2 ^* K; e- H6 {4 I运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！