3FC

Explanation
The system detected an error in the processing
following an external interrupt. The program that experienced the
external interrupt is running under a task control block (TCB) or
service request block (SRB).
A hexadecimal reason code in register
15 explains the error: Code
Explanation
00
The system detected, but does not support, a third recursion of
this interrupt.
04
An error occurred during processing for the interrupt.
08
An error occurred during a first recursion.
0C
An error occurred during a second recursion.

System action
The system abnormally ends the active task that
experienced the external interrupt. The system writes a logrec data
set error record.

Operator response
If the system programmer asks for an SVC dump,
set the following SLIP trap: SLIP SET,COMP=3FC,ACTION=SVCD,END

System programmer response
Do the following: Find the original abend causing the problem in the system diagnostic
work area (SDWA) in the logrec data set error record.
Search problem reporting data bases for a fix for the problem.
If no fix exists, ask the operator to set a SLIP trap to obtain an
SVC dump. Contact the IBM® Support
Center. Provide the SVC dump and the logrec data set error records.

Programmer response
Resubmit the job. If the error recurs, contact
the system programmer.

Source
Supervisor control