菜鸟求救

simon198678

一直提示MODEL IS ILL DEFINED. CHECK FOR UNDEFINED INDICES AND/OR CONDITIONS IN EXPRESSION
程序如下
model:
sets:
     gh/A1,A2/:R;
     ps/D1,D2,D3/:V,L;
     yh/B1,B2..B7/;
     linksgp(gh,ps):a,x;
     linkspy(ps,yh):c,y;  
endsets
data:
     R=100 200;
     V=300 600 500;
     D=20 30 80 40 60 30 40;
     a=2.5 5 10
       12.5 6.5 3.5;
     c=6 2.5 6.5 11 14.998 23 20.5
       25 6.496 2.496 5 8.492 16.499 13.498
       17 11 5 2.5 4.492 12.5 9.494;
enddata
@FOR(gh(I):
     @SUM(ps(J):x(I,J))<=R(I));  
@FOR(yh(k):
     @SUM(ps(J):y(J,K))>=D(K));
@FOR(ps(J):
     @SUM(ps(J):x(I,J))=@SUM(ps(J):y(J,K)));  
@FOR(ps(J):
     L(J)=@SUM(ps(J):x(I,J)));
T1=@SUM(linksgp:a*x);
T2=@SUM(linkspy:c*y);
T3=@SUM(ps:V*L^0.5);
min=T1+T2+T3;
end
请高手们帮帮我啊！