IST744I

Explanation
 This message is the first in two message groups.
A full description of the two message groups follows.
 The message
group displayed depends on the type of session, as follows:  If the session-establishment attempt was for an SSCP-SSCP session,
the failed request is ACTCDRM and the following group of messages
is issued:   IST744I  CROSS-NETWORK SESSION SETUP FAILED, NETWORK = netid
 IST745I  ACTCDRM TO CDRM = cdrmname FAILED, SENSE = code
 IST531I  FROM SUBAREA = subarea, ELEMENT = element
 IST531I  TO SUBAREA = subarea, ELEMENT = element
[IST528I  VIRTUAL ROUTE NUMBER vrlist]
 IST523I  REASON = {SESSION SETUP REJECTED|VR ACTIVATION FAILED}
 An
ACTCDRM request was sent to CDRM cdrmname.
 code is
the sense data from the negative response to an ACTCDRM request. See
the z/OS Communications Server: IP and SNA Codes for a description of code.

If the session-establishment attempt was for an LU-LU session,
the failed request is a BIND RU and the following group of messages
is issued:   IST744I  CROSS-NETWORK SESSION SETUP FAILED, NETWORK = netid
 IST746I  BIND FAILED FROM pluname TO sluname, SENSE = code
 IST531I  FROM SUBAREA = subarea, ELEMENT = element
 IST531I  TO SUBAREA = subarea, ELEMENT = element
[IST528I  VIRTUAL ROUTE NUMBER vrlist]
 IST523I  REASON = {SESSION SETUP REJECTED|VR ACTIVATION FAILED}
 The
real name of the primary logical unit (PLU) is pluname,
and the real name of the secondary logical unit (SLU) is sluname. code is
the sense data from the negative response to the BIND request. See
the z/OS Communications Server: IP and SNA Codes for complete sense code information.

 The first display of message IST531I indicates the PLU’s
address, as known in network netid (subarea subarea and
element element). If the subarea and element addresses
are unknown, VTAM® issues either 0 or *NA* in
place of the address.
 The second display of message IST531I
indicates the SLU’s address as known in network netid (subarea subarea and
element element). If the subarea and element addresses
are unknown, VTAM issues either 0 or *NA* in
place of the address.
 The reason for the session activation
failure is indicated by message IST523I:  SESSION SETUP REJECTED
The gateway NCP has received a negative response to the session
activation request.
VR ACTIVATION FAILED
A virtual route in network netid could not
be activated.  Message IST528I might also be displayed with vrlist providing
a list of virtual routes that the gateway NCP tried to activate in
network netid.

System action
 Session activation fails.

Operator response
 Issue the DISPLAY ROUTE command for all networks
involved in this session setup to display the status of explicit routes
and virtual routes. Save the system log for problem determination.

System programmer response
  SESSION SETUP REJECTED
Review the logon mode table entry used with the session.
VR ACTIVATION FAILED
Ensure that all COS table definitions and PATH definition statements
are correct and that all required links and nodes are active.

 If all definitions are correct, and all
required links and nodes are active, take the following actions:  If you have access to IBMLink, search for known problems with similar
symptoms.  If no applicable matches are found, report the problem
to IBM® by using the Electronic
Technical Report (ETR) option on IBMLink.
If you do not have access to IBMLink, report the problem to the IBM software support center.

Routing code
 8

Descriptor code
 4 