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，
4 ?; }- \6 d) c6 {/ `$Title A Investment Problem
+ Q) G1 t2 N/ \+ j. X$ontext
9 M5 ]- o3 d+ q+ c9 R$ `this problem finds a optimized investment that meets
requirements in the city
+ a/ K3 E9 D4 x3 Z$offtext
  Z; r* r0 i* D; U% e0 GSets
% K" c  V6 g, R! }    i  power plants  /plant-1, plant-2, plant-3, plant-4/
0 h( E6 B( I5 B3 {: W+ L    j  operating mode  /mode-1, mode-2, mode-3/;
- g$ {) O/ S% A& K( l% r7 g: ^Parameters
    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
3 ?( Q6 I1 k& n5 [$ `9 I. ~        plant-2  7
        plant-3  16
        plant-4  6/
: `6 B  s0 S* b0 b# t9 U    d(j)  the electricity demand for power plant i in cases
& ?. Y( d2 g! C" O- b; S. R% r8 ^9 T  p       /mode-1  3
        mode-2  3
        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
        plant-3   0.32     0.192    0.032
7 F# E/ g& I- b. D. C        plant-4   0.55     0.33     0.055;
Scalar 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
7 a; @) c3 o# J% r. c9 g       y(i,j) the operating lever of the i power plant under the j operating mode
' ^2 k5 h8 s/ s; F9 z) K9 U       z the total cost of the four power plant;
Positive Variable x;
5 p* X5 }. G3 S. t( F9 v$ M4 _Equations
3 R$ M7 B' b/ n" k& L/ d       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
       demand(i)      satisfy the electricity demand under each operating mode;
! {# [% A( w8 W; `) b2 y: h- ~cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
9 t+ w3 |: I5 L# e3 ocapacity1(i)..    sum(i,x(i)) =g= m;
. ]; ~' y) T# n" |, c, j7 D# Wbudget(i)..       sum(i,c(i)*x(i)) =l= b;
, J! c) c3 r( B  B# W* X6 dcapacity2(j)..    sum(j,y(i,j)) =l= x(i);
demand(i)..       sum(i,y(i,j)) =g= d(j);
: Q9 k5 f$ s  O9 K8 ]Model investment /all/;
, T4 S% v2 @3 @1 u  o! X, jSolve investment using lp minimizing z;
/ g9 S# b6 g. S. F( k, lDisplay y.l, y.m;
) e8 L" r( j) x. f, h
! M& }: }2 S$ t+ a8 H# T5 @运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！