Not entry is neither N nor blank; defaults to blank.
20
Cause . . . . . : A Not entry (positions 28, 36, or 44 of an Input-Record specification) is neither N nor blank.
Recovery . . . : Specify N or blank in the Not entry (positions 28, 36, or 44). Compile again.
(C) Copyright IBM Corporation 1992, 2006. All Rights Reserved.