SVC 15 (0A0F)

ERREXCP macro - is type 1, gets LOCAL, IOSUCB, IOSYNCH, and CPU locks.

Calls module IECVPST, entry point IGC015.

APF protected via TESTAUTH. GTF data is:

R15 and R0: No applicable data.
R1: Address of the IOSB that was assigned to this I/O request by IOS.

DDNAME	cccccccc	Name of the DD statement associated with this I/O request.
	U/A	Indicates that the DDNAME was unavailable because the DEB address was verified as not valid.
	********	A program check occurred trying to gather the DDNAME.

ERP flags:

IOSFLA flags from IOSB assigned to this request by IOS.

Format is:

Flag			Comments
IOSERR	..1.	....	Error routine is in control of this SRB. If the ERP returns with this bit on a retry is assumed. If the ERP returns with this bit off, the error is considered to be permanent or corrected depending on the setting of bit IOSEX.
IOSEX	....	.1..	Exceptional condition is set by IOS. Upon return from the abnormal or normal exit with this bit on, ERP processing is initiated if this is an initial error condition. If this bit is off, it is assumed that the exit corrected the condition or did not consider it an error. When the error routine returns with this bit on and bit IOSERR is off, the error is considered permanent. When the ERP returns with both bits off, the error has been corrected.
	xx.x	x.xx	No meaning for ERREXCP.

TCB: Address of the TCB associated with the SRB scheduled to handle this I/O request.
DCUU: Device number, in channel-unit form, of the device associated with this I/O request.