Diagnosis
You attempted to assign the attribute "Require field" (obligatoryoutput) to an input/output field, but the "input field" attribute isnot set.

System Response
Invalid attribute combination rejected.

Procedure
if you want to assign the "Required field" attribute, you must firstassign the "Input field" attribute.
Not all templates can be input fields. Fields to which an icon isassigned can only be output fields.