RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 three Rachel, you will be an attractive genius!!! And that i am an idiot. Thanks so much for the answer. I used to be binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. MaartenMaarten 23k33 gold https://newlaunchvillasnoida.blogspot.com/