RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you happen to be an attractive genius!!! And I am an idiot. Thank you a lot of for the solution. I had been binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. Names are https://godrejsector49gurugram.blogspot.com