43E

Explanation
The event control block (ECB) address specified
with the ECB parameter on the ATTACH macro instruction that created
a task was not valid when the subtask abnormally ended.

System action
The ECB is not posted.  The system abnormally
ends the originating task of the caller.

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 and the assembly listing
associated with the job.

Programmer response
Determine if the area containing the ECB
was freed before the subtask completed processing.  Correct the error.
 Run the job again.
The ECB was specified in the ATTACH macro,
and the system checked it for validity while attaching the subtask.
The ECB could be incorrect when the subtask is detached or at end
of task through a request of the storage containing the ECB.

Source
Task management