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，
$Title A Investment Problem
/ Y* O# l/ l+ t1 J1 C9 N$ontext
this problem finds a optimized investment that meets
% H' X% A! S! q3 x2 `* Q5 S1 [6 L6 arequirements in the city
$offtext
% i& h1 X2 b, X  c$ mSets
* `9 {: w0 m# {  A; h, i! k3 T. X    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
       /plant-1  10
( a3 P5 b  u3 J7 F$ u" R' a$ I% u        plant-2  7
        plant-3  16
        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
       /mode-1  3
        mode-2  3
        mode-3  2/;
( ~* E5 H- w& U4 @/ X8 ~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
5 [0 N& I, p' I7 u9 G% o2 a4 [        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
+ r1 E# ~* }8 v- a& z; f        plant-4   0.55     0.33     0.055;
5 X! e% Y* L" i+ A# F( }' i' S* fScalar m the minimum total installed capacity of the four power plant /12/
; `+ O- C" O& j" o       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
       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;
- `  F$ S% e& p4 W- }# Q" ?9 v6 uPositive Variable x;
- A& n9 r7 K# f2 B, [) QEquations
       cost           define objective function
0 c' h& J# t( X       capacity1(i)   observe total capacity linmit at plant i
+ d" i+ b+ l8 w# |       budget(i)      observe total investment budget limit at plant i
) {8 z9 T5 }2 i- ?+ K5 J% e       capacity2(i)   observe installed capacity for each power plant
( j6 b) E' l1 `+ V       demand(i)      satisfy the electricity demand under each operating mode;
* P: c5 w( J- e. Ucost..            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);
) N& T8 n. l$ m4 }( edemand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
  X) P. w: @) A0 f' nSolve investment using lp minimizing z;
- K2 q! K: i: _  kDisplay y.l, y.m;

. \  k0 m/ K9 p! w运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！