Microsoft KB Archive/256906

= SNA Server Fails Unexpectedly with Access Violation in S1PROLU6 =

Article ID: 256906

Article Last Modified on 6/24/2004

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APPLIES TO


 * Microsoft SNA Server 3.0 Service Pack 4, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 4.0, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 3.0 Service Pack 2, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 3.0 Service Pack 3, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 3.0 Service Pack 4, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 4.0, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 4.0 Service Pack 1, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 4.0 Service Pack 2, when used with:
 * the hardware: Intel x86
 * Microsoft SNA Server 4.0 Service Pack 3, when used with:
 * the hardware: Intel x86

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This article was previously published under Q256906



SYMPTOMS
During conversation startup for a Transaction Program (TP), SNA Server may fail unexpectedly with an Access Violation error message in the S1PROLU6 module.

If the Drwtsn32.exe file is installed as the default debugger on the computer running SNA Server, the following exception log may occur:

Application exception occurred:

App: obj\i386\snaservr.exe (pid=283)

When: 2/23/2000 @ 15:22:55.937

Exception number: c0000005 (access violation)

function: s1prolu6

010350e9 668b4010 mov ax,[eax+0x10] ds:019fea07=????

010350ed 8d4de4 lea ecx,[ebp-0x1c] ss:025ae942=????????

010350f0 8945f4 mov [ebp-0xc],eax ss:025ae942=????????

010350f3 51 push ecx

010350f4 0fbfc0 movsx eax,ax

010350f7 8b0485a0791401 ds:00000000=????????

mov eax,[s1scb+0x4e20 (011479a0)+eax*4]

010350fe 668b8094000000 mov ax,[eax+0x94] ds:00000094=????

01035105 8945f0 mov [ebp-0x10],eax ss:025ae942=????????

01035108 0fbfc0 movsx eax,ax

0103510b 8b04857cc21901 ds:00000000=????????

mov eax,[s1lnkfh+0x14 (0119c27c)+eax*4]

FAULT ->01035112 668b4004 mov ax,[eax+0x4] ds:019fea07=????

01035116 50 push eax

01035117 8945e0 mov [ebp-0x20],eax ss:025ae942=????????

0103511a e883e7feff call s1pcsgo (010238a2)

0103511f 8d45cc lea eax,[ebp-0x34] ss:025ae942=????????

01035122 50 push eax

01035123 ff75e4 push dword ptr [ebp-0x1c] ss:025ae942=????????

01035126 e877e7feff call s1pcsgo (010238a2)

0103512b 8b45f8 mov eax,[ebp-0x8] ss:025ae942=????????

0103512e 80781202 cmp byte ptr [eax+0x12],0x2 ds:019fea06=??

01035132 a194120001 ds:01001294=6020fcfc

mov eax,[_imp____dwEnabledTraces (01001294)]

01035137 7538 jnz s1prolu6+0x682 (01035171)


 * Stack Back Trace *

FramePtr ReturnAd Param#1 Param#2 Param#3 Param#4 Function Name

00baff3c 01032dd2 00000029 011dbe18 00000000 0000001f trcservr!s1prolu6 (FPO: Non-FPO [0,18,3])



CAUSE
This problem can occur when a TP_ENDED(Hard) verb is issued for an invoked TP during conversation startup for the TP, which causes SNA Server to immediately clean up all internal resource structures allocated to the conversation.

If SNA Server is in the process of LU validation when this happens, then SNA Server tries to reference the resource structures allocated to the conversation, which now no longer exist, resulting in the Access Violation error message.



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 Server versions 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 3.0 SP4, 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3.

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

Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB256906

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