I have a feature class for buildings in the same geodatabase there a feature class for parcels each building should be located in specific parcel with parcel number field in the buildings feature class I need to create relationship class in away that check the parcel number in the building if it is not exist in the parcel feature class then the user must first insert the parcel in the parcel feature class(building with no parcel is not allowed) I try the rules in the relationship class but with no results. any help is appreciated