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 F3 [. L, Q. W$Title A Investment Problem
$ontext
, d8 t+ ^. f3 @, z5 H  othis problem finds a optimized investment that meets
; L; b$ x& G3 Q3 L4 N8 e& F6 k% K3 irequirements in the city
$offtext
Sets
2 `* Z7 P7 Y2 x8 ~    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
9 T- ?9 Z; h5 S- h- ?' G    c(i)  the unit installed capacity of power plant i in cases
       /plant-1  10
& y( Y+ A8 {& H/ p        plant-2  7
5 n2 e+ V) J0 Y" \1 [$ t  k; Q2 m        plant-3  16
- w+ l6 K! l6 o        plant-4  6/
    d(j)  the electricity demand for power plant i in cases
; m% {7 s& d0 b- U5 S6 y4 e6 E       /mode-1  3
9 ]+ F  A2 e: b& b' C+ |0 T        mode-2  3
. P5 ]& X9 e# w. q        mode-3  2/;
Table f(i,j) the unit operating cost of each power plant
* s3 r5 j/ d$ [. k9 \' n" w                 mode-1   mode-2   mode-3
2 k: h0 L$ j1 r( U/ {( w/ [) J# n        plant-1   0.4      0.24     0.04
: [! a/ U& ]6 v        plant-2   0.45     0.27     0.045
& T( e" v, T! B) b* v% b' x3 g3 y        plant-3   0.32     0.192    0.032
& N. ~( _! F9 n1 J5 c" w) |" t( y        plant-4   0.55     0.33     0.055;
5 `8 I" c% E* a) MScalar m the minimum total installed capacity of the four power plant /12/
       b the minimum tatal investment budget of the four power plant /120/;
  l% r7 w9 M7 eVariables
; I3 w; \# Z/ {: w- B0 g       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;
Positive Variable x;
; j. W! m5 h: FEquations
       cost           define objective function
- `# ], c1 y- c) l, ?0 ?       capacity1(i)   observe total capacity linmit at plant i
+ o4 h" p+ C0 h( q7 m       budget(i)      observe total investment budget limit at plant i
5 }5 b0 f9 D+ z0 X4 @% I2 K0 _       capacity2(i)   observe installed capacity for each power plant
       demand(i)      satisfy the electricity demand under each operating mode;
; R: M9 l* Y; a0 bcost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
( [9 O6 L* a% o' \; @8 _capacity1(i)..    sum(i,x(i)) =g= m;
budget(i)..       sum(i,c(i)*x(i)) =l= b;
! K" X5 c( }' A; ucapacity2(j)..    sum(j,y(i,j)) =l= x(i);
. n: I( S6 }8 I- Jdemand(i)..       sum(i,y(i,j)) =g= d(j);
Model investment /all/;
% L" X* A3 S0 D7 @' S) N8 CSolve investment using lp minimizing z;
Display y.l, y.m;
* s# T- G4 o; a$ `0 Z
运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！