Yalmip constraint problem -using function ceil and abs

I am working on mip problem using yalmip-cplex to solve the problem.

yjt=intvar(T,Nst,'full');
xikt=binvar(n,10,T,'full');
Here is my constraint:
for t=1:T
       for k=1:10
  Constraint=Constraint+[xikt(:,k,t)==ones(30,1,1)-ceil(abs(Wijt(:,:,t)*yjt(t,:)'-(k-1))/1000)];
       end
 end

I find that this constraint does not work when I use yalmip cplex to solve the problem. Is this because of the function ceil or abs which I use?Or some other reasons? The same code works fine using GA algorithm.

Appreciate if someone can tell me the reasons and solutions. Thanks.