Tape Label Processing Installation Exits

This topic discusses installation exits for specialized tape processing. With these replaceable modules you can:

Create and process nonstandard tape labels.
Edit labels when versions, label types, density, or volume serial number conflicts are detected.
Control volume access, file access, and label validation for ISO/ANSI Version 3 and Version 4 volumes.
Selectively convert pre-Version 3 volumes to Version 3 or Version 4 volumes.

Table 1 lists the replaceable modules available for tape label processing.

Table 1. Tape Label Processing Modules
Module Name	Description	When Available
IFG019LA	Label anomaly	Called from open and end-of-volume (EOV)
IFG019VM	Volume mount	Called from open and EOV
IFG019FV	File validation	Called from open and EOV
IFG019FS	File start on volume	Called from open and EOV
IFG055FE	File end on volume	Called from close and EOV
NSLOHDRI NSLEHDRI	Nonstandard label processing routines for input headers	Called from open and EOV
NSLOHDRO NSLEHDRO	Nonstandard label processing routines for output headers	Called from open and EOV
NSLETRLI	Nonstandard label processing routine for input trailers	Called from open
NSLETRLO NSLCTRLO	Nonstandard label processing routines for output trailers	Called from EOV and close
IEFXVNSL	Automatic volume recognition (AVR) nonstandard label processing	When AVR cannot identify the first record on a magnetic tape volume as a standard label
NSLREPOS	Volume verification using the dynamic device reconfiguration (DDR) option for nonstandard label processing	When DDR is used for nonstandard labels
IFG0193C IFG0553C	Volume label editor routines for open and EOV	At open and EOV
IFG0193G	ISO/ANSI Version 3 and Version 4 label installation exits for volume access, file access, label validation, and label validation suppression	At open or EOV file access: after positioning to a requested data set
IEECVXIT	Replaced by IEAVMXIT	No longer available
IEAVMXIT	WTO, WTOR message processing installation exit	Label version conflict