OW04456: IST663I REQUEST TO ISTAPNCP FAILS WITH NON REROUTABLE SENSE. MAY ALSO SEE MSGIST893I GDS CDINIT FAILURE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When adjacent sscp routing is being done and VTAM receives a
  sense code from ISTAPNCP, the APPN side of VTAM, that the
  subarea adjsscp routing does not recognize, adjsscp routing
  stops.  The sense code is treated as a non-reroutable sense
  code.
  The following is an example only:
  IST663I IPS SRC  REQUEST TO  ISTAPNCP RECEIVED, SENSE=08210002
  IST664I REAL  OLU=NETY.CICSY   REAL  DLU=NETX.CICSX
  IST889I SID = C597D38B92687EE7
  IST264I REQUIRED LOGMODE NAME  SNALOGMD UNDEFINED
  IST891I NET.CDRM23   GENERATED FAILURE NOTIFICATION
  IST893I ORIGINAL FAILING REQUEST IS GDS CDINIT
  IST314I END
  Additional symptoms: PRSCDPRE for an LU even
  though there are no CP-CP sessions. We are trying to
  search APPN even though there are no APPN connections.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All using the NODETYPE start option.         *
  ****************************************************************
  * PROBLEM DESCRIPTION:   When adjacent sscp routing is being   *
  *                      done and VTAM receives a sense code     *
  *                      from ISTAPNCP that the subarea adjsscp  *
  *                      routing does not recognize, adjsscp     *
  *                      routing stops.  The sense code is       *
  *                      treated as a non-reroutable sense.      *
  *                      Also, APPN routing is attempted when    *
  *                      there are no CP-CP sessions. P114251.   *
  *                        SLU initiated session from an EN      *
  *                      hangs.  Sense 10010033 to a CDINIT      *
  *                      is seen on the PLU host and the NNS.    *
  *                      P109027.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When adjacent sscp routing is being done, ISTSSCUX will attempt
  to route to ISTAPNCP even if there are no CP-CP sessions.
  When adjacent sscp routing is being done and VTAM receives a
  sense code from ISTAPNCP that ISTSSCZI does not recognize,
  ISTSSCZI will treat it as a non reroutable sense code. Adjsspc
  routing stops and the session fails with the sense returned by
  ISTAPNCP.
  When a resource off an End Node (EN) VTAM sets up a SLU init
  session cross network, VTAM was saving its own name as the
  CP PLU.  When a second SLU init session was attempted, the
  session hung.  The CDINIT failed with 10010033 on the PLU host
  and the NNS.
  

Problem conclusion

• ISTSSCUX was changed to not route to ISTAPNCP if there are no
  CP-CP sessions. ISTSSCZI, ISTSXCAC, and ISTSXCXP were changed
  to examine the failure info returned from ISTAPNCP and treat
  an unrecognized sense code as reroutable if there was no DLU CP
  name returned.  If the DLU CP name was returned, this indicates
  the DLU was found, so an unrecognized sense code will be treated
  as non reroutable.  ISTSSCZI has a list of recognized sense
  codes that are processed on an individual basis. PTM P114251.
    ISTSSCFY, ISTSSCB3, ISTSXCXP, and ISTSXCCR have been changed
  to save the PLU CP name received on the SRC/CDSESSST in the PLU
  RDTE. This name was already being included on the IPS but
  wasn't being parsed or used.  This will cause the next CDINIT to
  succeed.  PTM P109027.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UW06495 UW06496

Modules/Macros

• ISTSSCB3 ISTSSCFY ISTSSCUX ISTSSCZI ISTSXCAC
  ISTSXCCR ISTSXCXP
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R101 PSY UW06495

     UP94/06/14 P F406

• R201 PSY UW06496

     UP94/06/14 P F406

Fix is available

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