I have a view with RI set for one field. The RI is set to "On/Empty/Null" and the Parent RI table is set with an index.
Then I click "Save" on a form that uses the view, I get a message that "An invalid entry..." is found for the field that is set up with RI. The form field for the view field is empty, but I thought the view RI set at "On/Empty/Null" would allow an empty field. Am I missing something?