I am banging my head on my desk using this type of binding error.. I have checked numerous with the postings for your BindingExpression route error and cannot see everything that works with my condition. Even so, the binding within the IncrementingTextBox IsEnabled property is leading to a BindingExpression path https://whitelandsector103gurgaon.school.blog/2025/07/08/smart-world-one-dxp-sector-113-gurgaon-leads-the-future-of-intelligent-living/