Diagnosis
You activated the input help for a reference field. The system isunable to find a specification that meets the search criteriaand can be referenced. The system only filters out for selectionfrom the set of hits those specifications that can be referenced.
A specification cannot be referenced in the following two cases:

• If it is of a specification type that cannot be referenced
(->Customizing)

• If it has references itself. The system does not permit dual-level
referencing.