lingo 错误代码63、161，好像把倒数第二行改为ef(i,j):错误代码就变成161了

model:
title arrange;
sets:
people/1..2/:;
jobs/1..7/:;
link(people,jobs):a,x;
endsets
data:
a=2 3 8 9 10 7 6
3 8 5 9 7 6 4;
enddata
[OBJ]min=@max(people:@sum(jobs:a(i,j)*x(i,j)));
@for(jobs:@sum(people:x(i,j))=1;);
@for(people:@for(jobs:@bin(x(i,j))));
end

修改如下：
model:

title arrange;
sets:
people/1..2/:;
jobs/1..7/:;
link(people,jobs):a,x;
endsets
data:
a=2 3 8 9 10 7 6
3 8 5 9 7 6 4;
enddata
min=@max(people(i):@sum(jobs(j):a(i,j)*x(i,j)));
@for(jobs(k):
@sum(people(t):x(t,k))=1;);
!@for(people(i):@for(jobs(j):@bin(x(i,j))));
@for(link: @bin(x));
end
部分结果：
Local optimal solution found.
Objective value: 19.00000
Objective bound: 19.00000
Infeasibilities: 0.000000
Extended solver steps: 1
Total solver iterations: 282