16D

Explanation
The system was processing one of the following
Supervisor Call (SVC) extended service routines (ESR): 109
116
122
137

The system detected an incorrect ESR code in register
15. This error is the result of a program specifying either: An incorrect ESR code
An unsupported ESR code

A hexadecimal reason code in register 15 explains the
error: Code
Explanation
0004
A program specified an incorrect ESR code. The ESR code was too
large.
0008
A program specified an unsupported ESR code.

System action
The system moves the incorrect ESR code from register
15 to register 2. The system abnormally ends the program that issued
the incorrect SVC instruction. The system may write 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=16D,ACTION=SVCD,END

System programmer response
  Do the following: Ask the operator to set a SLIP trap to obtain an SVC
dump.
In the system trace, back up to the *RCVY entry for
abend X'16D'. Look for an SVC entry, other than SVC D, prior
to the *RCVY entry. In the entry, note the address in the PSW ADDR
column.
Use the address in the PSW to identify the module that
called supervisor control. For an installation-provided module, correct the problem as follows: For reason code X'0004', correct the ESR code, and run
the job step again.
For reason code X'0008', be sure that the requested ESR
is installed in the system.

For an IBM® module, search
problem reporting data bases for a fix for the problem. If no fix
exists, contact the component group associated with this module at
the IBM Support Center. Provide
the SVC dump and, if available, the logrec data set error record.

Source
Supervisor control