If the labelling I/O completes successfully, no new messages nor new return codes are returned in the IEHINITT return code.

If the labelling I/O is not attempted because of pre-label exit processing, a return code 20 is returned (24, if the SYSPRINT card is mi/ssing).

If the labelling I/O is not attempted, or the label I/O fails due to errors related to Pre- or Post-label exit processing IEHINITT messages are shown.