SCA$_NORMAL           An occurrence has been successfully
                          returned.

    SCA$_NEWNAME          An occurrence has been successfully
                          returned. This occurrence has a different
                          name from the occurrence that was returned
                          by the previous call to this routine with
                          this query context. This condition implies
                          that this new occurrence is also of a
                          different symbol.

    SCA$_NEWITEM          An occurrence has been successfully
                          returned. This new occurrence is of a
                          different symbol from the occurrence that
                          was returned by the previous call to this
                          routine with this query context.

    SCA$_NOMORE           Warning. An occurrence has not been
                          returned. The traversal of the query result
                          has been exhausted.