I created a nintex form with Sharepoint 2013. The form hides and showes two sheets based on selecting - Sheet One / Sheet Two. Within each sheet, there are two required fields that must be enter to submit the form. I tried to apply rule on the field: isNullOrEmpty({Self}) && Selection == "Sheet One", but it does not work. even I just apply isNullOrEmpty({Self}) rule on the field, it does not stop the submission when I do not enter anything in the field. Anyone know why? how to do it?
I also tried to set fields as " required" in Sharepoint list column, but they stop submission when selected Sheet One and filled all required fields within Sheet One since Sheet Two has required fields, but they are not needed to fill in when select Sheet One.