Look-Ahead field must not be a data-structure-subfield name; specification is ignored.
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Cause . . . . . : The Field-Name entry (positions 49 - 62 of an Input-Field specification) must not contain the name of a data-structure subfield within a Look-Ahead record.
Recovery . . . : Specify a valid Field-Name entry, or omit the specification. Compile again.
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