IKJ56883I   type NOT operation, REQUEST CANCELED

The dynamic allocation error code is 0484. If IEF336I does not accompany this message, request was canceled by the operator. Otherwise, see IEF336I to determine the reason for the cancellation (default policy or installation exit). For a description of dynamic allocation return, informational, and error codes, see z/OS MVS Programming: Authorized Assembler Services Guide.