57D

Explanation
During processing of an EVENTS macro, the system
found either: An incorrect event control block (ECB) address
The program issuing the EVENTS macro instruction is running under
a protection key (8 through 15) that is different from the protection
key of the ECB

System action
The system abnormally ends the program that issued
the EVENTS macro.

System programmer response
  If the error recurs and the program
is not in error, look at the messages in the job log for more information.
Search problem reporting databases for a fix for the problem. If no
fix exists, contact the IBM® Support
Center. Provide the program listing and the assembly listing associated
with the job.

Programmer response
Ensure that the ECB address specified is
a valid virtual storage address and that it was not incorrectly modified.
 Also, ensure that the ECB is placed in storage belonging to the program
issuing the EVENTS macro or the program running under protection key
0 through 7.  Correct the error.  Run the job again.

Source
Task management