I have a problem on this source code:

new UtenteDAO().makePersistent(utente);
Set set = utente.getNormativeSegnate();
results = new java.util.ArrayList();
for(Iterator it = set.iterator(); it.hasNext(); ) {
Normativa n = (Normativa)it.next();
results.add(it.next());
n.getArgomento().getDescrizione(); //EXCEPTION!!
}

makePersistent perform an update on utente.

The session is active...so that collection is not detached and lazy initialization shouldn't be a problem!

Why this happens?