OA49940: LOOP IN ISTTSCCU PROCESSING AN XID WITH A NULL CPNAME

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• VTAM received an XID that contained a null CPNAME. This caused
  VTAM to loop in ISTTSCCU in the CHKV6181 segment.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server                   *
  * for z/OS Version 2 Releases 1 and 2 SNA:                     *
  * Enterprise Extender                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Loop in ISTTSCCU when receiving bad XID                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF                                                    *
  ****************************************************************
  1. A partially formed XID is received for an EE connection.
  2. ISTTSCCU enters a loop while trying to process the XID.
  

Problem conclusion

• ISTTSCCU is updated to avoid the loop for this problem XID
  

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:

  UA80755 UA80756

Modules/Macros

• ISTTSCCU ISTAUCLA
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R210 PSY UA80755

     UP16/04/19 P F604 ¢

• R220 PSY UA80756

     UP16/04/19 P F604 ¢

Fix is available

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