Hi,
I am new to Hibernate.
I am facing the problem
java.lang.IllegalArgumentException: node to traverse cannot be null!

while updating a row.
The code is
session session = null;
Transaction ts = null;
try{
query.append("update PasswordDTO set newPassword = :v_newPassword, confirmPassword = :v_confirmPassword where userName = :v_userName");
session = MyHibernatesessionFactory.getSessionFactory().openSession();
ts = session.beginTransaction();
hbQuery = session.createQuery(query.toString());
....
....
}
catch(HIbernateException e){}
catch(Exception e){}


The error is generating on hbQuery = session.createQuery(query.toString()); code.
My Hbm file also is working for other uses.But This error why its generating i am in a confusion.
Please help
Thanks
Mohan