The data structure has fields with an unknown datatype. These fields are ignored.
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Cause . . . . . : Subfields of an externally described file with an unknown or otherwise ignored type have space allocated in the data structure, but no name is given.
Recovery . . . : Check the types of the fields in the file used for the externally-described data structure. If necessary, change the types of the fields in the file to have types that are recognized by the RPG compiler and compile again.