PM76357: ABENDS402 IN VTAM DUE TO A BAD ECB ADDRESS PASSED FROM MODULE DFSCM7V0. 12/11/01 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • S402 abend was issued by VTAM in the IMS address space. This
    abend was due to a bad ECB address passed to VTAM on a CHANGE
    request made by Csect CM7VVGR.
     The sequence of events was that the SCIP exit was driven for
    a BIND request for an MSC Link. The receiving IMS had fewer
    sessions than Links defined. During processing in DFSCM7A0
    the code detected that there was no LXB available for this
    new session and prepared to issue a DFS3213 message. There
    was a logic error in the routine that builds the RPL and NIB
    

Local fix

  • when sending this error message and the ECB address placed in
    the RPL was a residual value. Instead of passing a valid
    ECB on the Change request the SAP address was in the RPLECB
    field.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All IMS V11 users with MSC VTAM links,       *
    *                 Generic Resources active, and APAR           *
    *                 PM24942/UK64086.                             *
    ****************************************************************
    * PROBLEM DESCRIPTION: ABENDS402 in VTAM due to a bad ECB      *
    *                      address passed in RPLECB by             *
    *                      DFSCM7V0.                               *
    *                                                              *
    *                      This is a retro-fit of APAR PM76240.    *
    ****************************************************************
    * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
    ****************************************************************
    ABENDS402 is issued by VTAM in the IMS address space. This
    abend was due to an invalid value passed in RPLECB to VTAM on
    a CHANGE ENDAFFNF request made by DFSCM7V0.  The failing
    sceanario is as follows:
    
    1. The SCIP exit was driven for a BIND request for an MSC
       Link.
    
    2. Due to maximum sessions reached on this IMS, no LXB was
       available for this session.
    
    3. DFSCM7A2 detects that an LXB is not available and does not
       store the LXB ECB into RPLECB.  However, whatever residual
       value was in R10 (in this case, the SAP address) is stored
       into RPLECB.
    
    4. Code added by APAR PM24942 to use RPLECB expected a valid
       value.  Thus, when a CHANGE ENDAFFNF was issued with an
       invalid value in RPLECB, VTAM abended with an ABENDS402.
    

Problem conclusion

  • GEN:
    KEYWORDS:
    
    *** END IMS KEYWORDS ***
    DFSCM7A0 has been modified to store zeros into RPLECB if an
    LXB block is not available.
    
    DFSCM7V0 has been modified to check the value in RPLECB.
    If the value is zero's the CHANGE ENDAFFNF call will not
    be issued.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    PM76357

  • Reported component name

    IMS V11

  • Reported component ID

    5635A0200

  • Reported release

    102

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-01

  • Closed date

    2012-11-15

  • Last modified date

    2012-12-04

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

    PM76240

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

    UK83546

Modules/Macros

  •    DFSCM7A0 DFSCM7V0
    

Fix information

  • Fixed component name

    IMS V11

  • Fixed component ID

    5635A0200

Applicable component levels

  • R102 PSY UK83546

       UP12/11/21 P F211 ®

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


More support for:

IMS

Software version:

102

Reference #:

PM76357

Modified date:

2012-12-04

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