大神。求教。为什么会出现Index variables may not share names with other variab...

zx1009294

model:
sets:
var/1..12/:a;
obj(var,var):x;
endsets
data:
a=2.8 3.2 1.2 4 2.7 0.9 2.5 3.3 1.7 2.5 3.6 4.7;
enddata
min=@sum(var(i)sum(obj(k,l)|k#le#i:x(k,j)*a(j)));
@for(objbin(x));
@for(var(i)sum(var(j):x(i,j))=1);
@for(var(j)sum(var(i):x(i,j))=1);
end

zx1009294

min=@sum(var(i)sum(obj(k,l)|k#le#i:x(k,j)*a(j)));

zx1009294

那个表情是：加上@