Microsoft KB Archive/286168

= Application Exception in Snalink!UpdateDLSData =

Article ID: 286168

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 3.0 Service Pack 4
 * 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
 * Microsoft SNA Server 4.0 Service Pack 4
 * Microsoft Host Integration Server 2000 Standard Edition

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This article was previously published under Q286168



SYMPTOMS
SNA Server or Host Integration Server 2000 systems being used to distribute DLC 802.2 link services for use by branch SNA Servers and/or Host Integration 2000 servers in a Distributed Link Service (DLS) environment may experience an application exception in Snalink!UpdateDLSData.

NOTE: The problem only occurs when a DLS connection terminates unexpectedly. Therefore, the Application Event log may contain events normally associated with connection outages prior to the application exception. Common connection outage events logged by SNA Server/HIS 2000 include the following events: 23, 227, 226.



CAUSE
The application exception occurs when a NULL message pointer is passed into the UpdateDLSData function.



SNA Server 4.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft SNA Server version 4.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.

Host Integration Server 2000
To resolve this problem, obtain the latest service pack for Host Integration Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

328152 How to Obtain the Latest Host Integration Server 2000 Service Pack

The English version of this fix should have the following file attributes or later:

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Host Integration Server 2000 Service Pack 1.



MORE INFORMATION
If DRWTSN32.exe is configured as the default debugger, information similar to the following is added to the DRWTSN32.LOG when this application exception occurs: Application exception occurred: App: exe\snalink.dbg (pid=89) When: 12/5/2000 @ 19:8:42.58 Exception number: c0000005 (access violation)

[data omitted...]

6338917d 7fec            jg      UpdateDLSData+0x8b (6338916b) 6338917f a17c1a3963  mov eax,[DlsData+0x344 (63391a7c)] ds:63391a7c=63391a80 63389184 6840173963      push    0x63391740 63389189 50              push    eax 6338918a 6849173963      push    0x63391749 6338918f ffd3            call    ebx 63389191 83c40c          add     esp,0xc 63389194 c7053817396300000000                           ds:63391738=00000000 mov    dword ptr [DlsData (63391738)],0x0 6338919e 8bb42420010000  mov     esi,[esp+0x120]        ss:00baff0c=63387d83 633891a5 6849183963      push    0x63391849 FAULT ->633891aa 660fb64e0a      movzx   cx,byte ptr [esi+0xa]        ds:0161ea08=?? 633891af 51              push    ecx 633891b0 e84f350000      call    GetClientWorkstationName (6338c704) 633891b5 85c0            test    eax,eax 633891b7 0f84cd010000    je      UpdateDLSData+0x2aa (6338938a) 633891bd 8d542414        lea     edx,[esp+0x14]         ss:021ce7f3=???????? 633891c1 52              push    edx 633891c2 6a03            push    0x3 633891c4 6a00            push    0x0 633891c6 6849173963      push    0x63391749 633891cb 6802000080      push    0x80000002 633891d0 ff1500103863                                   ds:63381000=77dd992e call   dword ptr [_imp__RegOpenKeyExA (63381000)]

In addition, an event similar to the following will be logged in the Application Event Log:

Event ID: 624

Source: SNA Server

Description: Creating dump file D:\sna\traces\snadump.log for snalink.exe

Additional query words: HIS 2000

Keywords: kbbug kbfix kbhostintegserv2000sp1fix kbhostintegserv2000presp1fix KB286168

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