请高手帮我找下这个Lingo程序的错误!下面是Lingo程序

请高手帮我找下这个Lingo程序的错误!下面是Lingo程序
model:
sets:
hotel/1..10/;
format/1..3/;
link(hotel,format):x,y,c;
endsets
min=@sum(link:x*y*c);
@for(format(j):@sum(hotel(i):(y(i)*r(i,j)))=num(j)/2);
@for(format(j):@sum(hotel(i):(y(i)*r1(i,j)+y(i)*r(i,j)))>=(num1(j)+num(j)/2));
@for(hotel(i):@sum(format(j):x(i,j))>=1);
@for(hotel(i):@sum(format(j):x(i,j))