lingo 错误 63

lingo 为什么错误63啊

sets:
hang/1..3/:a;
lie/1..3/:x;
ju(hang,lie):c;
endsets
data:
a=40 100 180;
c=1 0 0
1 1 0
1 1 1;
enddata
min=@sum(lie(j):50x(j)+0.2x(j)^2)+8x(1)+4x(2);
@for(hang(i):@sum(lie(j):c(i,j)*x(j))>a(j));