RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges two three Rachel, you might be an attractive genius!!! And I am an idiot. Thank you much for the solution. I used to be binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. @property is often a Resource https://m3mresidentialprojectsgurgaon.blogspot.com/2025/06/jms-mega-city-sohna-redefining.html