OA39414: EZZ4321I ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION FOR DEVICE IUTSAMEH

APAR status

• Closed as program error.

Error description

• Some time after VTAM start, when the EE XCA Major Node is
  activated, the following message is seen in TCP/IP: EZZ4321I
  ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION TO
  x.x.x.x FOR DEVICE IUTSAMEH. All EE XCA lines remain in PALNK
  status.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All using Enterprise Extender (EE).          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Attempt to activate the EE XCA Major    *
  *                      Node yields the following TCP/IP        *
  *                      message:                                *
  *                                                              *
  *                          EZZ4321I ERROR: CODE=0810004A       *
  *                          DURING SETUP PHASE ON CONNECTION    *
  *                          TO  x.x.x.x FOR DEVICE IUTSAMEH.    *
  *                                                              *
  *                      All EE XCA lines remain in PALNK        *
  *                      status.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  With VTAM active, HPR is running and allocating TIPACs for
  packing buffers.  These TIPACs may be in the T100 or T200
  format.  As they are discarded via TSDSCARD/TSALERT, ISTTSCUD
  checks each buffer to determine if it might be an EE activation
  request.  ISTTSCUD looks in the PDUWA to do so.
  
  Because these TIPACs are not in the expected TI00 format, the
  field XBFL_PDUWA is actually pointing to an ISTSND block.
  ISTTSCUD references the ISTSND as though it were a PDUWA and
  falsely decrements the TSEXT EE count as a result, making the
  count go negative.
  
  Some time later, request to activate the EE XCA Major Node is
  issued.  Because the TSEXT EE count is not zero, the request
  fails. VTAM must be recycled to get EE to activate again.
  

Problem conclusion

• The PDUWA_EE_Setup indicator has been moved the base TSCB,
  replacing an unused bit (TSCFIS).  This will remove the
  dependency ISTTSCUD currently has on the TIPAC being in the
  proper format when checking for EE activation requests.
  
  All parts that reference PDUWA_EE_Setup have been changed to
  reference the new bit TSC_EE_Setup instead.
  
    ISTTSCUD
    IUTLLCIX
    IUTLLCCS
    IUTLLCGI
  
  As a precaution, ISTTSCUD will reset the bit after checking it.
  This will ensure the bit is not left on residually should the
  the buffer be reused without being cleared.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UA65459

Modules/Macros

• ISTAUCLA ISTTSCB  ISTTSCUD IUTLLCCS IUTLLCGI
  IUTLLCIX IUTPDUWA
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels