<str>.<str> does not appear in the REDUCED TO clause.

  Explanation:  When a REDUCED  TO  clause  appears  in  a  record
  selection  expression,  the  results  of  referencing any of the
  fields not contained in the REDUCED TO clause are  not  defined.
  Although  the  preprocessor  does not disallow this, the results
  are not guaranteed.  SQL does not permit such usage.

  User Action:  Either add the missing fields to  the  REDUCED  TO
  clause, or eliminate the reference to these fields.