invalid input a syntax error has occurred 代码11

a1x11+a2x12+a3x13+...+a100x1100<=b1
a1x21+a2x22+a3x23+...+a100x2100<=b2
。。。
a1x201+a2x202+a3x203+...+a100x20100<=b20
row/1..20/:k;
tt/1..100/:t;
目标函数略。。
@for(row(i):@sum(tt(j):t(j)*x(i,j))>=k(i););
。。。
哪不对了