RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you happen to be a lovely genius!!! And I am an idiot. Thank you a great deal of for the solution. I had been binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. But https://m3mcommercialprojects.fashion.blog/