While attempting to publish a new survey using version RC1 3.10.222, i am getting the error "Unable to add feature service definition code 400". Searching help suggests that I may have a duplicate value in the Name column of the XSLForm. I am unable to find a duplicate entry visually nor by using Excel Conditional Formatting> Highlight Cells Rules> Duplicate Values tool. No cells are highlighted red normally indicating duplicate entries.
Is there some other reason I might be getting this error?