GRP4006

A Sequence entry (positions 15-16) of an Input-Record specification is not alphabetic when a Look-Ahead entry is specified in the Record-Identifying-Indicator field (positions 19-20).

Specify alphabetic characters (A-Z) for the Sequence entry (positions 15-16) when a Look-Ahead entry is specified in the Record-Identifying-Indicator field (positions 19-29). Compile again.