A field that contains an administrative zone, such as city, district, or postal code, in the reference data was not assigned to the locator role field in the Field Mapping parameter of the Create Locator tool. It is recommended that you assign administrative zones when building a locator. Failing to map them can impact geocoding quality and performance. For example, region and region abbreviation are used to help create different forms of state highways that are specific to each region or state.
Assign at least one field from the reference data that contains an administrative zone to at least one of the locator role administrative zone fields in the Field Mapping parameter.