37D

Explanation
During processing of an EVENTS macro, the system
found that another task was currently waiting on the EVENTS table.

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 data bases 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 no program can issue any EVENTS
macro that specifies a table currently being waited on.  Correct the
error.  Run the job again.

Source
Task management