IST192I

Explanation
 VTAM® issues
this message to the system console when the program operator interface
could not allocate VTAM private
storage for a VTAM message
to be transferred to a program operator application.

System action
 Processing continues.  If the VTAM message is a write-to-operator with reply
(WTOR) or an unsolicited VTAM message, VTAM will reroute the "failing" message
to the system console. Other messages will be discarded.

Operator response
 Wait a short time and reenter the command.
If PPOLOG=YES is in effect, messages being written to the primary
program operator log could be causing VTAM private
storage to be depleted.  Issue a MODIFY PPOLOG=NO command to stop
logging.
 If VTAM continues
to issue this message,  enter the DISPLAY STORUSE command to display
storage usage for storage pools. Message IST981I displays total VTAM private storage information.
If this message does not appear in the display, you might need to
reissue the DISPLAY STORUSE command, specifying a higher value for
the NUM operand. See z/OS Communications Server: SNA Operation for additional information. Save the system
log and request a dump to determine current private storage usage.

System programmer response
  Review the amount of private storage allocated to VTAM.  Verify that the size of the user region
for VTAM is defined properly.
You might want to cancel program operator applications that are
using excessive private storage. 
If PPOLOG=YES was in effect, verify that all VTAM messages have been received by the primary
program operator (PPO) by issuing RCVCMD macros.

 Note: If PPOLOG=YES and the no-storage condition has cleared,
the primary program operator application might also receive this message.