RachelRachel 133k6767 Gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you're a gorgeous genius!!! And I am an fool. Thanks a lot of for the answer. I used to be binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. So your DataContext for "video_length_textbox" https://commercialofficespacesalenoida.blogspot.com/2025/05/build-your-legacy-with-signature-global.html