RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 three Rachel, you might be a good looking genius!!! And I am an idiot. Thanks a lot for the solution. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. The top Invest in application https://m3mprojectinsector58.blogspot.com