Look-Ahead field name has been previously defined; specification is ignored.
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Cause . . . . . : A Look-Ahead field name entry (positions 49 - 62 of an Input-Field specification) has been previously defined as an input field, or as a Look-Ahead field.
Recovery . . . : Specify a unique Look-Ahead Field-Name entry (positions 49 - 62). Compile again.
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