RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, you will be a lovely genius!!! And that i am an idiot. Thanks a great deal for the solution. I used to be binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. MaartenMaarten 23k33 https://aipljoydistrictsector88.school.blog/2025/07/10/modern-serenity-awaits-at-aipl-sector-103-gurgaon/