model is ill defined问题求帮忙

卡布其诺

写了一个FLP问题的LINGO程序，不过运行时一直报model is ill defined，请各位大神帮帮忙看看到底是哪里出了问题，代码如下：
MODEL:
sets:

pr/1/;
ai/1/:T;
pa/1..4/;
ag/1..3/;
praipa(pr,ai,pa):WH,XH;
praiag(pr,ai,ag):WDA;
prpaag(pr,pa,ag):XD,WDB;
prai(pr,ai):R,Y,C;
aipa(ai,pa):FH,ZH;
aiag(ai,ag):FDA;
paag(pa,ag):FDB,ZD;
prpa(pr,pa): Q,U,D;

endsets

data:

T=1100;
WH=20 20 17 20;
WDA=4 3 2;
WDB=28 30 26 24 26 22 26 28 24 28 30 26;
R=48;
Y=1;
C=1100;
FH=40 30 25 20;
FDA=25 25 25;
FDB=35 45 45 25 35 35 15 20 20 15 35 25;
Q=60 30 30 40;
D=100 200 300 400;

enddata

!目标函数;
min=lda;

!约束条件;
((((@sum(praipa(i,j,k):WH(i,j,k)*XH(i,j,k)))+(@sum(praiag(i,j,l):WDA(i,j,l)*XD(i,j,l)))+
(@sum(prai(i,j):R(i,j)*Y(i,j)))+(@sum(aipa(j,k):FH(j,k)*ZH(j,k)))+(@sum(aiag(j,l):FDA(j,l)))+
(@sum(paag(k,l):FDB(k,l)*ZD(k,l)))+(@sum(prpaag(i,k,l):WDB(i,k,l)*XD(i,k,l)))+(@sum(prpa(i,j):Q(i,j)*U(i,j))))-20018)/3964)< (lda);

0<lda<1;
@for(pr(i): @for(ai(i):ZH(i,i)=(@if(XH(i,i,i) #eq# 0,0,1))));
@for(pr(i): @for(ag(i):ZD(i,i)=(@if(XD(i,i,i) #eq# 0,0,1))));
@for(pr(i): @for(ai(j): ((@sum(pa(k): XH(i,j,k)))+(@sum(pa(k): XD(i,k,i))))<(Y(i,j)*C(i,j))));
@for(ai(j): (((@sum(pr(i): @sum(pa(k): XH(i,j,k))))+(@sum(pr(i): @sum(pa(j): @sum(ag(k): XD(i,j,k)))))))<T(j));
@for(pr(i): @for(ai(j): (XH(i,j,i))<@sum(pa(i): ZH(j,i)*D(i,i))));
@for(ag(i): @for(pr(i): (XD(i,i,i))<@sum(pa(i): ZD(i,i)*D(i,i))));
@for(ai(j): (@sum(ag(i): @sum(pr(i): @sum(pa(i): XD(i,i,i)))))>(0.6*((@sum(pr(i):@sum(pa(i): XH(i,j,i))))
+(@sum(ag(i): @sum(pr(i): @sum(pa(i): XD(i,i,i))))))));
((@sum(ai(i): XH(i,i,i)))+(@sum(ag(i): XD(i,i,l)))+U(i,i)-D(i,i))<((0.2*D(i,i))*(1-lda));

!非负条件;
@for(pr(j): @for(ai(j): @for(pa(j): @gin(XH(j,j,j)))));
@for(pr(j): @for(pa(j): @for(ag(j): @gin(XD(j,j,j)))));
@for(pr(j): @for(pa(j): @gin(U(j,j))));
@for(ai(j): @for(pa(j): @bin(ZH(j,j))));
@for(pa(j): @for(ag(j): @bin(ZD(j,j))));

END