RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you will be an attractive genius!!! And I am an idiot. Thank you a great deal of for the solution. I used to be binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. ✦ https://affordablehousinginbhiwadi.blogspot.com/