RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you happen to be a beautiful genius!!! And I am an fool. Thanks much for the solution. I had been binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. So your DataContext for "video_length_textbox" https://propertyingurgoan.health.blog/2025/07/11/spiti-palm-estate-farukhnagar-premium-residential-plots-for-a-future-ready-lifestyle/