Our application has inputs for a date and the date is required. The format is 3 textboxes with slashes between the boxes: <textboxMM>/<textboxdd>/<textboxYYYY> The date is required. Here's the problem: if any combination of textboxes is left blank we need 1 error to display. If all are blank we do not want 3 errors. We'll also need to verify if the date is valid, but I think that solving the "required" issue is solved will take care of other problems of fields that depend on one another. :roll: I am currently reading on Interrelated fields [Husted pg 397] but having trouble piecing the logic together for what I need.