RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges two three Rachel, you happen to be an attractive genius!!! And I am an idiot. Thanks so much for the solution. I was binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. Nor wondering if the validation https://m3mpropertiesnewgurgaon.blogspot.com