RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you're a lovely genius!!! And that i am an fool. Thanks much for the solution. I was binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. So your DataContext for "video_length_textbox" is about to https://prprosperity.blogspot.com/2025/06/signature-global-plots-farukhnagar.html