I'm banging my head on my desk with this particular binding mistake.. I have checked quite a few of the postings to the BindingExpression path mistake and can't see something that actually works with my situation. Even so, the binding over the IncrementingTextBox IsEnabled property is producing a BindingExpression path https://signumplaza93sector93.blogspot.com/2025/05/step-into-world-of-refined-living-at.html