RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 three Rachel, you will be a lovely genius!!! And that i am an fool. Thank you much for the solution. I used to be binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. Names are better https://m3mnewprojectsgurgaon.blogspot.com/2025/06/jms-mega-city-sohna-redefining.html