A fix is available
APAR status
Closed as program error.
Error description
ABEND0C4 in ISTLUCSL due to freed NSSCB..
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of VTAM APPC (APPC=YES on the * * VTAM APPL statement) and/or VTAM APPN * **************************************************************** * PROBLEM DESCRIPTION: ABEND0C4 in ISTLUCSL * **************************************************************** * RECOMMENDATION: * **************************************************************** The problem may be summarized as follows: 1. CP-CP session initialization is started. 2. While the Init_Other for the session is outstanding, an APPCB control block (NSSCB) is prematurely freed. 3. When the Init_Other response returns, LUS references the freed control block. ISTLUCSL ABENDs and then other ABENDs may also occur (e.g., ISTLUCRP, ISTNSCAK)
Problem conclusion
ISTNSSCB and ISTTSEXT are updated to facilitate the side-queueing of the NSSCB when the imbedded RPL is still active. ISTNSCAE, ISTNSCAG, ISTNSCAH, ISTNSCAI, ISTNSCAO, ISTNSCAP, ISTNSCAS, and ISTNSCAT are updated to side-queue the NSSCB if the RPL is still active. This is only true for CP-CP sessions. ISTTSCWU is updated to process any NSSCBs that were side-queued. ISTPSCR1 is updated to enhance the VRR coverage. ISTINCEI and ISTINCMT are recompiled due to ISTTSEXT growth. ISTNSCLR is included for maintenance purposes only.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
OA42811
Reported component name
VTAM V4 MVS/ESA
Reported component ID
569511701
Reported release
1D0
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-07-11
Closed date
2013-07-31
Last modified date
2013-10-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UA70127 UA70128 OA42983
Modules/Macros
ISTINCEI ISTINCMT ISTNSCAE ISTNSCAG ISTNSCAH ISTNSCAI ISTNSCAO ISTNSCAP ISTNSCAS ISTNSCAT ISTNSCLR ISTNSSCB ISTPSCR1 ISTTSCWU ISTTSEXT
Fix information
Fixed component name
VTAM V4 MVS/ESA
Fixed component ID
569511701
Applicable component levels
Fix is available
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Document Information
Modified date:
03 October 2013