请问这段Lingo程序错在哪里?

请问这段Lingo程序错在哪里?
MODEL:
SETS:
Add/1 2 3 4 5 6/:p;
Demand/1 2 3 4 5 6/:d;
Num/1 2 3 4 5 6/:x;
Left/1 2 3 4 5 6 7/:y;
ENDSETS
DATA:
p=0.1 0.1 0.2 0.2 0.3 0.3;
d=42 32 41 67 25 29;
ENDSETS
min=@SUM(0.5*(1+Add(I):p(I))*(Num(I):x(I))^2)+@SUM(0.05*q*Demand(I):d(I))+@SUM(0.1*Num(I):x(I));
@FOR(Left(I):@GIN(y(I)));
y7=0;
@FOR(Num(I):@GIN(x(I)));
END