IEA652A WTO STORAGE EXHAUSTED - WTOS is DISCARDED

Explanation
Outstanding WTO messages have used all of the available
buffer space. Some WTOs is discarded.

System action
The system processes only WTO messages that might
be critical to relieving the buffer shortage, such as responses to
the D C,B and D R commands. All other WTO messages are discarded.
 Discarded messages are not sent to the console.
Commands
issued while WTO storage is exhausted are executed, but command response
messages are not displayed or logged except for responses to D C,B
and D R commands.
JES3 monitors some command responses to update
status for devices and jobs.  Because these command responses are
not issued JES3 is unable to process the status changes. When buffer
space becomes available, the system issues message IEA655I.

Operator response
Examine the output from the D C,B command.
Based on the information displayed: If a console has accumulated a large number of messages, do one
of the following: Use the CONTROL Q command to purge the messages
Use the CONTROL E command to delete messages
Use the CONTROL S command to put the console into roll mode and
allow messages to roll off the screen
Use the VARY CN command to deactivate the console.

If an address space has accumulated a large number of messages
notify the system programmer.
If a large number of messages have arrived from another system
then diagnose the problem on the system sending the messages.
If a large number of messages are waiting for delivery to another
system, then try to relieve the buffer shortage on the target system.

System programmer response
If an address space has accumulated
a large number of messages, follow the response for message IEA099A.
Otherwise, follow the system programmer response for message IEA404A.

Source
Communications Task (COMMTASK)

Module
IEAVMQWR

Routing code
1,2

Descriptor code
1