Look-ahead entry already defined on previous Input-Record specification; specification is ignored.
20
Cause . . . . . : A Look-Ahead entry (** in positions 21 - 22 of an Input-Record specification) is specified, but a previous Look-Ahead specification has been defined for the file.
Recovery . . . : Omit all but one definition for a Look-Ahead record (positions 21 - 22). Compile again.
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