I have two tuples like this:

tuple Combination_L {
  int rooms;
  int instructors;
  int studentgroups;
  int courses;
};


{Combination_L} L = ...;


tuple Combination_T {
  int days;
  int slots;
};


{Combination_T} T = ...;

So, I want to combine Tuples L and T to initialize the Tuple V.
And this Tuple Vl must be:

tuple Combination_L_T{
  int rooms;
  int days;
  int slots;
  int instructors;
  int studentgroups;
  int courses;
};

{Combination_L_T} Vl = {};
execute {
 for (var p in L){
   for (var q in T){
     Vl.add(<p.rooms, 
             q.days,
             q.slots, 
             p.instructors, 
             p.studentgroups,
             p.courses>);
   };
 }; 
};

So, I become a error warning “missing expression” by Vl.add.
Could you tell me please, how could I fix this error?. Thanks all!