OA40631: ABEND0C4 IN IKTLTERM DURING RECONNECT PROCESSING

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Abend 0C4 in IKTLTERM + X'4A4' at HVT61D0 level during
    reconnect processing.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All TSO users.                               *
    ****************************************************************
    * PROBLEM DESCRIPTION: ABEND0C4 in IKTLTERM during the         *
    *                      reconnect processing.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    This problem may be described as follows:
      1. TSO user USER1 address space was in the reconnect status.
      2. USER1 tried to Logon with the reconnect option.
      3. IKTLOGR received a control to process the Logon reconnect
         processing. It issued WAIT macro to wait for the IKTLTERM
         process to complete the processing.
      3. IKTLTERM received control to process the Logon reconnect
         processing. It issued STIMER macro to start the timer
         to allow the OPNDST to complete.
      4. For some reason, OPNDST process was waiting for something.
      5. Timer exit routine of IKTLTERM received control to cancel
         the USER1 address space. It issued LOCASCB macro to find
         the waiting address space of IKTLOGR. It found an address
         space control block. But it was not the address space of
         the waiting process of IKTLOGR. The address space of the
         waiting process of IKTLOGR was already terminated and it
         was not available. This caused the ABEND0C4 in IKTLTERM.
    

Problem conclusion

  • IKTLOGR has been changed to save the address of the address
    space control block (ASCB) in a TSBX. IKTLTERM has been
    changed to verify the address of the ASCB from LOCASCB with
    the saved address of ASCB in the TSBX before accessing the
    ASCB storage.
    

Temporary fix

Comments

APAR Information

  • APAR number

    OA40631

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    1D0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-23

  • Closed date

    2012-11-06

  • Last modified date

    2013-02-04

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

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

    UA67124 UA67125

Modules/Macros

  • IKTLOGR  IKTLTERM
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1C0 PSY UA67124

       UP13/01/03 P F301

  • R1D0 PSY UA67125

       UP13/01/03 P F301

Fix is available

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Document information


More support for:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

OA40631

Modified date:

2013-02-04

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