Microsoft KB Archive/243917

= SNA Workstation 4.0 Access Violation When SnaBase Ends =

Article ID: 243917

Article Last Modified on 11/24/2003

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APPLIES TO


 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3

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This article was previously published under Q243917



SYMPTOMS
When using SNA Workstation 4.0 or 4.0 Service Pack 1, the following problems may occur:  a 3270 emulator may stop responding while opening a new 3270 session  SnaBase.exe may fail with an access violation (C0000005) when being stopped, with the following stack trace:

FramePtr RetAddr   Param1   Param2   Param3   Function Name 13f6fca8 77f64ba2  00080000 000f2440 13f6fcd4 NTDLL!RtlpCoalesceFreeBlocks+0x2bc 13f6fcd8 0101dbf9  00080000 00000000 000f2448 NTDLL!RtlFreeHeap+0x7c 13f6fce8 0101b760  00000000 6723e4a8 00000001 SNABASE!CleanupCaching+0x19 13f6fcf0 6723e4a8  00000001 00000000 6727a5e0 SNABASE!NapTermCallback+0xa0 13f6fd10 67239925  00000000 00000000 00000000 SNADMOD!TermSnaDmod_int+0x68 6727a5e0 00000002  000000f4 000000f8 000000f0 SNADMOD!DMODServiceThread+0xa55 



CAUSE
This problem is caused by a regression introduced into SNA Workstation 4.0 Service Pack 1 due to an unrelated change made within SNA Server, which shares various components. The problem does not affect any version of SNA Server. It is specific to SNA Workstation only.



RESOLUTION
To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Workstation version 4.0 and version 4.0 Service Pack 1.

This problem was first corrected in SNA Server 4.0 Service Pack 4.

Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB243917

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