IST529I

Explanation
 The virtual-route-selection exit routine has terminated.
 reason can
be one of the following:  ABENDED WITH CODE code
The VR exit selection subtask, ISTPUCX0, abnormally terminated
with hexadecimal abend code code. See the z/OS MVS System Codes for more information.
EXCEEDED ABEND THRESHOLD
The VR exit selection subtask, ISTPUCX0, abnormally terminated
more than four times in less than four minutes.
REQUESTED TERMINATION
The exit routine requested its own termination by specifying a
nonzero return code when it returned control to VTAM®.
IS NOT OPERATIVE DUE TO A LACK OF STORAGE
The exit routine became inoperative because of a lack of storage.

System action
 Processing continues.  If the exit routine has
abended but has not exceeded its abend threshold, VTAM reinstates the exit routine. If the abend
threshold was exceeded or the exit routine requested termination, VTAM stops using the exit routine
and performs virtual route selection for session requests strictly
on the basis of the requested Class of Service.

Operator response
 Save the system log for problem determination.

System programmer response
 If the virtual route selection exit
routine abended, there is probably a programming error in the exit
routine. You can replace the exit routine with the corrected version
by using the MODIFY EXIT command. See z/OS Communications Server: SNA Operation for
information on the MODIFY EXIT command.
 If the exit routine
requested its own termination, there might be a programming error.

Routing code
 8

Descriptor code
 4 