OW23413: MSGIST259I INOP 01 WHEN ACTIVATING AHHC WITH CNT CHANNEL EXTENDERS.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MSGIST259I INOP 01 when activating a AHHC connection using in
  this case CNT's channel extender.  The trace showed that this
  problem occurred when the CE / DE was split.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All AHHC/MPC users.                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: VTAM issues IST259I INOP during         *
  *                      activation of an AHHC connection.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During the activation sequence of an AHHC connection, VTAM
  received a standalone DE to a PREPARE WRITE that was issued.
  Module ISTTSC8E determined that this was an asyncronous
  DE, when in fact it was a syncronous DE received in response
  to the PREPARE WRITE channel program.
  In this configuration, CNT channel extenders are being used.
  During the XID3 exchange at link activation, CNT sends immediate
  CE & DE on PREPARE READs.  However, on PREPARE WRITEs, they send
  an immediate CE but delay the DE until they have confirmation
  that the read on the other side completes.
  ISTTSC8E INOPed the AHHC connection when a syncronous DE was
  received to the PREPARE WRITE.  This problem only occurs
  on AHHC connections while the XCNSSFSM is XCNSSRDY and
  MPC dynamics is supported.
  

Problem conclusion

• Module ISTTSC8E has been corrected to analyze the interrupt
  correctly.
  

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:

  UW33561

Modules/Macros

• ISTTSC8E
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R301 PSY UW33561

     UP97/01/15 P F701

Fix is available

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