RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges two 3 Rachel, you happen to be a beautiful genius!!! And I am an fool. Thanks so much for the solution. I used to be binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. @property is a Instrument https://m3mcommercialprojectsgurgaon.blogspot.com