Microsoft KB Archive/225108

= SNA 4.0 SP2 May Cause Trap in Function RamWrite or CheckInboundQ =

Article ID: 225108

Article Last Modified on 9/22/2005

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APPLIES TO


 * Microsoft SNA Server 4.0 Service Pack 2

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This article was previously published under Q225108



SYMPTOMS
An application exception (trap) may occur at some point after installing Service Pack 2 for SNA Server 4.0. The function reporting the problem has been seen in either function RamWrite or function CheckInboundQ.

If you have Dr. Watson (Drwtsn32.exe) configured as the default debugger, a Drwtsn32.log file will be created in the [NTROOT] directory.

In addition to the Dr. Watson, a Snadump.log file will be created in the [SNAROOT\traces] directory. Both an event 4097 and 624 will get created in the application log of the Event Viewer with this occurs.

Drwtsn32.log example showing an exception in function RamWrite: Application exception occurred: App: exe\snalink.dbg (pid=pid #) When: 3/16/1999 @ 14:45:28.559 Exception number: c0000005 (access violation) [..] [..] State Dump for Thread Id [Thread Id]

eax=85a3a2a8 ebx=6726acf0 ecx=b2c0b7e8 edx=00000001 esi=9706fb1c edi=00000002 eip=6722d085 esp=00bcfcbc ebp=00bcfcdc iopl=0        nv up ei pl zr na po nc cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000             efl=00000246

function: RamWrite 6722d062 895004          mov     [eax+0x4],edx          ds:86ca8cae=8b045089 6722d065 8b0b            mov     ecx,[ebx]              ds:6726acf0=01010054 6722d067 8b35c8ac2667    mov     esi,[BmD (6726acc8)]   ds:6726acc8=01010000 6722d06d 8b4128          mov     eax,[ecx+0x28]         ds:b3e7a1ee=3328418b 6722d070 33c9            xor     ecx,ecx 6722d072 894df8          mov     [ebp-0x8],ecx          ss:01e3e6e2=???????? 6722d075 894d10          mov     [ebp+0x10],ecx         ss:01e3e6e2=???????? 6722d078 8d0cc0          lea     ecx,[eax+eax*8]        ds:85a3a2a8=???????? 6722d07b 8945f4          mov     [ebp-0xc],eax          ss:01e3e6e2=???????? 6722d07e 8db4cedc3b0000  lea     esi,[esi+ecx*8+0x3bdc] ds:b2c0f3c4=???????? FAULT ->6722d085 395610          cmp     [esi+0x10],edx         ds:982de522=????????

DRWTSN32.LOG example showing an exception in function CheckInboundQ: Application exception occurred: App: exe\mngagent.dbg (pid=pid #) When: 11/3/1998 @ 7:28:50.734 Exception number: c0000005 (access violation) [..] [..] State Dump for Thread Id [Thread Id]

eax=00000000 ebx=00000000 ecx=033fffb0 edx=033fffa8 esi=77f1c67a edi=77f674e0 eip=67226860 esp=033fff5c ebp=033fff64 iopl=0        nv up ei pl zr na po nc cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000             efl=00000246

function: CheckInboundQ 67226850 55              push    ebp 67226851 8bec            mov     ebp,esp 67226853 51              push    ecx 67226854 a1d85c2667      mov  eax,[BmD+0x10 (67265cd8)] ds:67265cd8=00000000 67226859 56              push    esi 6722685a 8945fc          mov     [ebp-0x4],eax          ss:0460e96a=???????? 6722685d 8b45fc          mov     eax,[ebp-0x4]          ss:0460e96a=???????? FAULT ->67226860 f0ff00          lock    inc dword ptr [eax]    ds:00000000=???????? NOTE: For this particular problem, the access violations can appear in a number of different SNA components (for example, Snaservr.exe, Snabase.exe, Snalink.exe, Snaprint.exe, and so on). This will be indicated by the Pid # in the Drwtsn32.log file.



CAUSE
This problem was due to a regression in the Snadmod.dll introduced in Service Pack 2.



RESOLUTION
To resolve this problem, obtain the latest service pack for SNA Server version 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 SNA Server 4.0 SP2. This problem was first corrected in SNA Server version 4.0 Service Pack 3.

Keywords: kbbug kbfix kbsna400sp3fix kbqfe kbfaq kbhotfixserver KB225108

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