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！！！
& W* I8 q7 B8 s* ]1 n我把程序贴在这，
) O2 `6 Q+ y) B" R& d; \3 D$Title A Investment Problem
$ontext
* w# V- K+ S( X. [$ L# lthis problem finds a optimized investment that meets
  `' @' Q' W: }; w9 U& rrequirements in the city
: ?1 e+ s0 o7 ^0 [$offtext
: r. X% h! j* f+ ]: [Sets
    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
' k* z# T9 R% |6 n! w, F! `9 F* yParameters
    c(i)  the unit installed capacity of power plant i in cases
6 W4 ~1 x' h0 f" ]% e       /plant-1  10
; m4 X; {+ Z% `- w8 g9 Z        plant-2  7
        plant-3  16
        plant-4  6/
0 ?# x' p: p  }6 G/ b8 O! X    d(j)  the electricity demand for power plant i in cases
  N& q) s+ z- A. m       /mode-1  3
, z2 B' S& z' n        mode-2  3
1 K. J5 o  H( S5 ]        mode-3  2/;
4 ~! Z/ K* x' S: ]1 B5 l! OTable f(i,j) the unit operating cost of each power plant
# t' T! b8 B: w9 f9 ?7 e4 z                 mode-1   mode-2   mode-3
        plant-1   0.4      0.24     0.04
: @8 O7 w" h" ~+ R, {        plant-2   0.45     0.27     0.045
$ J# s! |5 e6 s5 O9 [6 D        plant-3   0.32     0.192    0.032
        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
9 L* i/ }+ J0 {; m. g) f4 N+ _$ g       b the minimum tatal investment budget of the four power plant /120/;
9 S; g" A9 P4 m& N6 K! vVariables
       x(i) the installed capacity of the i power plant in cases
$ S1 g& D& S! V' a6 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;
7 t$ j. A' |7 ~% q) T* R4 REquations
       cost           define objective function
       capacity1(i)   observe total capacity linmit at plant i
' [/ ?+ h1 O' X# t0 ^       budget(i)      observe total investment budget limit at plant i
       capacity2(i)   observe installed capacity for each power plant
4 I9 I- A# i* n) h4 D- d# w: f5 L$ M       demand(i)      satisfy the electricity demand under each operating mode;
* l: n! e+ r) L) icost..            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;
  e3 K% G0 J! x6 N* |# ~capacity2(j)..    sum(j,y(i,j)) =l= x(i);
+ w) d+ D  f; t* j6 y$ ^  }$ Zdemand(i)..       sum(i,y(i,j)) =g= d(j);
8 ~- B+ U' G7 I! C: zModel investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;

6 K4 M% K5 p6 h5 b运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！