13E

Explanation
The task that created a subtask issued a DETACH
macro for that subtask, specifying STAE=NO, before the subtask ended.
This
may or may not be an error, depending on the intent of the user. Consequently,
the system does not abnormally end the task issuing the DETACH macro.

System action
The system abnormally ends the subtask to force
its completion.

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 source program listing for the job.

Programmer response
If the subtask must complete its processing
before being detached, use an ECB or ETXR operand on the ATTACH macro
that creates the subtask to achieve synchronization.

Source
Task management