The field is not valid for the specified control or match level.
20
Cause . . . . . : If a graphic field is to be included at a specified control or match level, then all fields at the specified control or match level must be graphic fields. The Control-Level entry (positions 63 - 64 of the Input specification) or the Matching-Fields entry (positions 65 - 66 of the Input specification) defaults to blanks.
Recovery . . . : Specify blanks in the Control-Level or Matching-Fields entry. Compile again.
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