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，
# F1 F: ?! p+ W9 Q7 F+ j5 o! `$Title A Investment Problem
* s2 z+ w2 E$ ?$ontext
this problem finds a optimized investment that meets
requirements in the city
% C6 Y( J, \) Z/ \; |$offtext
Sets
2 m+ P8 X# W0 \. ~2 @( `; h    i  power plants  /plant-1, plant-2, plant-3, plant-4/
    j  operating mode  /mode-1, mode-2, mode-3/;
Parameters
) }' R& |4 D. l* c, U& Y: T    c(i)  the unit installed capacity of power plant i in cases
7 b5 W& d" }" \- a9 P4 I       /plant-1  10
5 Z( i' B* C4 Z( b' m        plant-2  7
/ v: x% F- m) f+ j        plant-3  16
        plant-4  6/
* C8 k. h7 U( T7 I$ G1 H2 }    d(j)  the electricity demand for power plant i in cases
6 b" O, D, G$ X. ^. y$ @       /mode-1  3
        mode-2  3
        mode-3  2/;
+ ?4 Q) r, q; d* R5 Q! o. x4 ZTable f(i,j) the unit operating cost of each power plant
, A8 C) D$ I* @/ V                 mode-1   mode-2   mode-3
  O4 d% p8 s) I' K. A2 {        plant-1   0.4      0.24     0.04
        plant-2   0.45     0.27     0.045
        plant-3   0.32     0.192    0.032
. \9 q- E/ d. k" i. x/ ?9 H        plant-4   0.55     0.33     0.055;
Scalar m the minimum total installed capacity of the four power plant /12/
- z5 q2 o& T/ w1 v  B4 T3 T2 U# D       b the minimum tatal investment budget of the four power plant /120/;
, y8 S: i1 {% d- p1 F1 ?7 IVariables
7 H4 ]) y4 B% `) C8 q7 G       x(i) the installed capacity of the i power plant in cases
0 }$ q9 ^# E2 q7 I% x       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;
8 u9 i0 b$ {( e, }5 `) QEquations
/ U+ L5 c8 Z* P% j! `       cost           define objective function
' _$ ~; u" _. y9 X7 Y4 l       capacity1(i)   observe total capacity linmit at plant i
       budget(i)      observe total investment budget limit at plant i
8 O. m1 S; ~3 E: X- v6 }       capacity2(i)   observe installed capacity for each power plant
% \1 k  X( |9 `) s       demand(i)      satisfy the electricity demand under each operating mode;
" V* w# i" k4 k9 q" `cost..            z =e= sum(i,c(i)*x(i))+sum((i,j),f(i,j)*y(i,j));
; X/ j) o( J6 mcapacity1(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);
demand(i)..       sum(i,y(i,j)) =g= d(j);
( q6 V; N3 F0 CModel investment /all/;
Solve investment using lp minimizing z;
Display y.l, y.m;
/ \, C+ z9 n' N1 C  a
" I) w7 H6 p) Q运行出错的，但是不知道怎么解决，请亲给处理一下哦！！！