RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you are an attractive genius!!! And that i am an idiot. Thanks much for the solution. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. /information /verifyErrors The word in the example https://elanthemarkprice.blogspot.com