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OA56775: ABEND0E0-2A PIC2A LARGE MAXCAD= PARAMETER 19/03/12 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Error Description
    On a system running with a IEASYSxx MAXCAD= parameter
    specification greater than 125 and using parameter OSPROTECT=1,
    the use of an ALET for a common area dataspace may incorrectly
    result in an abend0E0-2A or other alet related reason code.
    
    Known Impact
    This may result in errors trying to read or write from a common
    area dataspace.
    
    Verification Steps
    Running with OSPROTECT=1
    IEASYSxx MAXCAD > 125
    MAXCAD specification  can be seen via IPCS
    IP CBF SVT and locating field MCADS.... 125. If this field is
    greater than x'7C' this may describe your issue.
    This error will also only occur when SVTNALV is identical to
    ASSBPALV.
    If both of these conditions occur and an abend0E0 occurs this
    may describe the issue.
    

Local fix

  • Change IEASYSxx MAXCAD= specification to a number lower than
    120.
    
    The RSM_MAXCADS health check can be used to help determine an
    appropriate MAXCAD setting and if a value lower than 120 is
    appropriate.
    
    PE information:
    Users Affected:  Customers running with the following
    environment:
    - HBB7790 PTF for OA55240 (UA96468)
    - HBB77A0 PTF for OA54807 (UA96477)
    - HBB77B0 PTF for OA55233 (UA96475)
    - AND specifying IEASYSxx parameters:
          MAXCAD >= 124
          OSPROTECT = 1
    
    User Impact:  ABEND0E0-2A for an ALET for a common area
    dataspace (CADS).
    IEASYSxx MAXCAD >= 124 and OSPROTECT = 1 have to be
    specified.
    
    User resolution:  Apply OA56775's PTFs as the apar is
    already closed.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    *  Users running z/OS HBB7790 and above                        *
    *                 with IEASYSxx MAXCAD >= 124 and              *
    *                 IEASYSxx OSPROTECT=1 specified, and          *
    *                 with the following service:                  *
    *                                                              *
    *                 OA55240: 790 PTF UA96468                     *
    *                 OA54807: 7A0 PTF UA96477                     *
    *                 OA55233: 7B0 PTF UA96475                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    *  Abend0E0-2A for an ALET for a                               *
    *                      common area dataspace (CADS) when       *
    *                      MAXCAD >= 124 is specified along        *
    *                      with OSPROTECT=1 (with PTFs for         *
    *                      OA55240 or OA54807 or OA55233           *
    *                      applied).                               *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Specifying MAXCAD >= 124 causes the null access list area to
    span a page, but the second page was not correctly backed
    by real storage.  So when a CADS ALET is used to an ALE on
    the second page, an abend0E0-2A can occur because the backed
    real storage for the second page was not contiguous with
    the first page of the null access list area.
    

Problem conclusion

  • Fixed the null access list area to be
    correctly backed by 2 contiguous real pages when
    MAXCAD >= 124 is specified with OSPROTECT=1.
    

Temporary fix

Comments

APAR Information

  • APAR number

    OA56775

  • Reported component name

    SUPERVISOR CONT

  • Reported component ID

    5752SC1C5

  • Reported release

    7A0

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-01-15

  • Closed date

    2019-03-12

  • Last modified date

    2019-04-08

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

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

    UA98747 UA98749 UA98750

Modules/Macros

  • IEAVNP09
    

Fix information

  • Fixed component name

    SUPERVISOR CONT

  • Fixed component ID

    5752SC1C5

Applicable component levels

  • R790 PSY UA98750

       UP19/03/27 P F903

  • R7A0 PSY UA98749

       UP19/03/27 P F903

  • R7B0 PSY UA98747

       UP19/03/27 P F903

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
08 April 2019