RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 three Rachel, you will be an attractive genius!!! And I am an idiot. Thank you a lot for the answer. I was binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. This flat is out there https://m3mprojectgurgaon.blogspot.com/2025/06/jms-mega-city-sohna-redefining.html