LINGO请问这段程式错误 @@

LINGO请问这段程式错误 @@
model:
sets:
A:i;
B/PD1..PD6/:j;
C(A,B)/1,X 1,Z 2,Y 3,X/:;
C(A,B):;
S/s1..s7/:k;
time/t1..t12/:t;
D(S,time):;
E(A,S):;
link(C,S,time):fit,match;
endsets
data:
A = @OLE('fit_stut.xls','pro30 ') ;
C = @OLE('fit_stut.xls','pg30');
fit = @OLE('fit_stut.xls','stu30');
enddata
@for(link:@bin(match));
max = @sum(link:fit*match);
限制B每一个元素於每一时间内只於一个摄影棚中录制一个节目;
@for(E(i,k) :@sum(B(j):@sum(time(t) :match(i,j,k,t)))