General Guidance

Exits can be specified with various utilities to:

Modify physical records
Handle I/O errors
Process user input/output header and trailer labels.

The exits are specified in a parameter of the EXITS statement in the various utilities, except for IEBDG and IEBUPDTE. The exits available from utility programs are listed in Table 1.

Table 1. User-exit routines specified with utilities
Exit Routine	When Available	Utilities	Where Specified
Modify physical records before processing by IEBGENER	After the physical record is read and before any editing is performed	IEBGENER	DATA parameter of EXITS statement
Input header or trailer label	When the data set is opened for input (header) or closed (trailer)	IEBCOMPR, IEBGENER, IEBPTPCH	INHDR/INTLR parameters of EXITS statement
Input header or trailer label		IEBUPDTE	PARM parameter of the EXEC JCL statement or INHDR, INTLR, OUTHDR, and OUTTLR parameter of ADD, CHANGE, REPL, or REPRO statements.
Output header or trailer label	When the data set is opened for output (header) or closed (trailer)	IEBCOMPR, IEBGENER	OUTHDR/OUTLR parameters of EXITS statement
Totaling	Prior to IEBGENER writing of each physical record (sequential data sets only)	IEBGENER	TOTAL parameter of EXITS statement
Totaling		IEBUPDTE	TOTAL parameter on the ADD, CHANGE, REPL, or REPRO Statements
I/O error	When permanent error occurs in IEBGENER	IEBGENER	IOERROR parameter of EXITS statement
Error detected by IEBCOMPR	After unequal comparison	IEBCOMPR	ERROR parameter of EXITS statement
Build output record key	Prior to IEBGENER writing of a record	IEBGENER	KEY parameter of EXITS statement
Process logical records of input data sets before comparison	Before input records are processed by IEBCOMPR	IEBCOMPR	PRECOMP parameter of EXITS statement
Process IEBPTPCH input/output records	Before logical record is processed (INREC) or before logical record is written (OUTREC)	IEBPTPCH	INREC/OUTREC parameters of EXITS statement
Analyze or modify IEBDG output record	After output record is constructed, but before it is placed in the output data set	IEBDG	EXIT parameter of CREATE statement