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，
$Title A Investment Problem
% k2 g  @! B  k0 x- U+ r; x$ontext
1 @1 h) R) W1 Wthis problem finds a optimized investment that meets
requirements in the city
$offtext
+ b+ ?: k& q7 vSets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
& C9 z7 I& R* w, j" P8 n) W5 M    c(i)  the unit installed capacity of power plant i in cases
' Y0 y; E$ K3 K) S       /plant-1  10
        plant-2  7
        plant-3  16
' R1 a4 c3 t; |2 {+ K" t) E        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
. y' A3 ^- r" d5 y       /mode-1  3
        mode-2  3
3 z8 _/ k8 A" V7 G        mode-3  2/;
# R- ]! h7 R! Y8 b; GTable f(i,j) the unit operating cost of each power plant
                 mode-1   mode-2   mode-3
* c% \! h) G% Q: A7 I1 S5 @5 w        plant-1   0.4      0.24     0.04
/ I* _& J$ s$ Q& v, o& [        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
3 _. L2 v' s% b" F' j! q        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/;
4 G7 x, d/ n- Z- |# E7 \( DVariables
" o+ o4 G4 H: e8 H( c; I       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 C8 f* m' D7 j% n       z the total cost of the four power plant;
5 f% u) K7 y7 t: mPositive Variable x;
$ U7 g8 K" }$ [9 X- n; c* B- qEquations
$ E9 i+ l  n) W4 G) J' V       cost           define objective function
/ c  {- w5 I5 l/ `+ t       capacity1(i)   observe total capacity linmit at plant i
+ a9 m7 W& H- j0 L+ K- s       budget(i)      observe total investment budget limit at plant i
       capacity2(i)   observe installed capacity for each power plant
# W; w+ v1 Z! t# ?8 M       demand(i)      satisfy the electricity demand under each operating mode;
. T9 U8 a+ M( ~0 Y! Q( M" K& K5 Hcost..            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;
# w: g, p" v1 o" w& n) T& Dbudget(i)..       sum(i,c(i)*x(i)) =l= b;
/ Q2 s& d. E% \; T; n* }capacity2(j)..    sum(j,y(i,j)) =l= x(i);
  m+ v) R$ b& @4 H+ S% ndemand(i)..       sum(i,y(i,j)) =g= d(j);
- N2 l- x! ~$ tModel investment /all/;
' B+ y. {5 R+ [; w/ F# O- GSolve investment using lp minimizing z;
Display y.l, y.m;

+ ?9 `$ x  ~* n0 X* f运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！