RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges two three Rachel, you're a wonderful genius!!! And I am an idiot. Thank you a lot of for the solution. I was binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. @property is really a Device that will https://newlaunchofficespaceinnoida.blogspot.com/