PM81764: ABEND0C4 IN CM7VVGR AFTER /RST LINK ALL WITH VGR ACTIVE. THE ECBADDRESS PASSED TO VTAM IS INVALID.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An ABEND0C4 occurred in module DFSCM7V0 routine CM7VVGR when an
  invalid ECB address (RPLECB) is passed to VTAM module ISTAICI2
  on a CHANGE ENDAFFIN call. The ABEND occurred in an environment
  with VGR active. The invalid address
  was passed to VTAM in R10 and appears in R8 at ABEND. The logs
  show a DFS3201 MAXIMUM SESSIONS REACHED message was issued for
  the MSC link immediately before the ABEND. The output RPL for
  the MSC link is being used to issue the RPLCHNG call, but it has
  not been initialized yet resulting in the ABEND0C4.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V13 users using MSC VTAM links       *
  *                 and VTAM Generic Resources.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: An ABENDS0C4 occurred in module         *
  *                      DFSCM7V0 routine CM7VVGR due to a       *
  *                      residual value in RPLECB.               *
  *                                                              *
  *                      This is a forward-fit of APAR PM80478.  *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  An ABEND0C4 occurs in module DFSCM7V0 due to an invalid ECB
  (RPLECB) address.  The problem occurs as follows:
  
  1. A cold MSC session is initiated via a /RST LINK command.
  
  2. Due to maximum sessions reached, a MSGDFS3201 message
     is issued.  As a result of this, DFSCM7A0 does not
     initialize the RPL in the output buffer.  CTB7INIT is not
     set to indicate that the RPL has been initialized.
  
  3. DFSCM7V0 gets control and issues a CHANGE ENDAFFNF request
     to VTAM.  Since the RPL has not been initialized, residual
     data in RPLECB results in the abend.
  

Problem conclusion

• GEN:
  KEYWORDS:
  
  *** END IMS KEYWORDS ***
  DFSCM7V0 has been modified to run the LXB chain to determine
  if the current LLB exists.  If the LLB exists in the LXB chain,
  RPLECB will be updated with the Send ECB from the LXB.
  

Temporary fix

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

Comments

APAR Information

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

  PM80478

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

  UK91687

Modules/Macros

•    DFSCM7V0
  

Fix information

• Fixed component name

  IMS V13

• Fixed component ID

  5635A0400

Applicable component levels

• R302 PSY UK91687

     UP13/02/20 P F302 Ž

Fix is available

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