Bichon Frize training to stop dog tagging

You know that you have achieved a successful result in bichon frize training. Then all of a sudden, he discovered the smell of dog urine on the driveway, table leg, and other furniture in the house. How do these things happen when you are very aware that you used appropriate and effective methods in internal training? If you see large pools of urine on the floor, it simply suggests that home tr...