Q313688: SNA Server Access Violation in Function S1PWHSES()
Article: Q313688
Product(s): Microsoft SNA Server
Version(s): 4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4
Operating System(s):
Keyword(s): kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbsna400sp4
Last Modified: 08-MAY-2002
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The information in this article applies to:
- Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4
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SYMPTOMS
========
The SNA Server service may terminate unexpectedly and cause all connected users
to lose their existing host sessions. If Drwtsn32.exe is configured as the
default debugger on the system, a Drwtsn32.log file similar to the following is
generated when this problem occurs:
Application exception occurred:
App: exe\snaservr.dbg (pid=<process id>)
When: <date> @ <time>
Exception number: c0000005 (access violation)
[...]
function: s1pwhses
0105eb14 66c745140300 mov word ptr [ebp+0x14],0x3 ss:0421ea09=????
0105eb1a c6451a00 mov byte ptr [ebp+0x1a],0x0 ss:0421ea08=??
0105eb1e b301 mov bl,0x1
0105eb20 e81b6bfaff call sbpenq (01005640)
0105eb25 e9ea030000 jmp s1pwhses+0x4b4 (0105ef14)
0105eb2a 663d0900 cmp ax,0x9
0105eb2e 0f85e0030000 jne s1pwhses+0x4b4 (0105ef14)
0105eb34 66c745140500 mov word ptr [ebp+0x14],0x5 ss:0421ea09=????
0105eb3a e8e10e0000 call s1pwcssq (0105fa20)
0105eb3f e9ce030000 jmp s1pwhses+0x4b2 (0105ef12)
FAULT ->0105eb44 668b4514 mov ax,[ebp+0x14] ss:0421ea09=????
0105eb48 663bc7 cmp ax,di
0105eb4b 7511 jnz s1pwhses+0xfe (0105eb5e)
0105eb4d 66c745140a00 mov word ptr [ebp+0x14],0xa ss:0421ea09=????
0105eb53 66c745240000 mov word ptr [ebp+0x24],0x0 ss:0421ea09=????
0105eb59 e9b4030000 jmp s1pwhses+0x4b2 (0105ef12)
0105eb5e 663d0900 cmp ax,0x9
0105eb62 0f85ac030000 jne s1pwhses+0x4b4 (0105ef14)
0105eb68 66c745140100 mov word ptr [ebp+0x14],0x1 ss:0421ea09=????
0105eb6e c644241301 mov byte ptr [esp+0x13],0x1 ss:01dce92f=??
0105eb73 e99a030000 jmp s1pwhses+0x4b2 (0105ef12)
0105eb78 668b4514 mov ax,[ebp+0x14] ss:0421ea09=????
*----> Stack Back Trace <----*
FramePtr ReturnAd Param#1 Param#2 Param#3 Param#4 Function Name
03000002 00000000 00000000 00000000 00000000 00000000 snaservr!s1pwhses (FPO: [EBP 0x00000000] [2,3,4])
03000012 00000000 00000000 00000000 00000000 00000000 snaservr!<nosymbols>
In addition, the SNA Server computer will log a message similar to the following
in the Microsoft Windows NT Application Event Log:
Event ID: 624
Source: SNA Server
Description: Creating dump file <snaroot>\traces\snadump.log for
snaservr.exe.
CAUSE
=====
The access violation in the S1PWHSES() function occurs because the SNA Server
service attempts to process an incorrectly formatted message that it receives
from a client across the native 3270 Emulator Interface Specification interface.
RESOLUTION
==========
A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Microsoft SNA Server version 4.0 that contains this fix.
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, please go to the following
address on the World Wide Web:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal 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:
+---------------------------------------------+
| File name | Date | Time |
+---------------------------------------------+
| Snaservr.exe | 12-Dec-2001 | 12:00 midnight |
+---------------------------------------------+
NOTE: Because of file dependencies, the most recent fix that contains the above
files may also contain additional files.
NOTE: If this product was already installed on your computer when you purchased
it from the Original Equipment Manufacturer (OEM) and you need this fix, please
call the Pay Per Incident number listed on the above Web site. If you contact
Microsoft to obtain this fix, and if it is determined that you only require the
fix you requested, no fee will be charged. However, if you request additional
technical support, and if your no-charge technical support period has expired,
or if you are not eligible for standard no-charge technical support, you may be
charged a non-refundable fee.
For more information about eligibility for no-charge technical support, see the
following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support
STATUS
======
Microsoft has confirmed this to be a problem in Microsoft SNA Server version
4.0, 4.0 Service Pack (SP) 1, 4.0 SP2, 4.0 SP3, and 4.0 SP4.
MORE INFORMATION
================
After you apply the upgrade, the SNA Server service will discard the invalid
message that causes this access violation. In addition, the following message
will be logged in the Windows NT Application Event Log when one of these invalid
messages is detected:
Event ID: 98
Source: SNA Server
Description: A 3270 emulator sent an invalid message, which has been discarded
by SNA Server.
Client Workstation: <workstation name>
Client Domain: <domain name>
Client User: <user name>
For additional information about how to configure Drwtsn32.exe as the default
debugger, click the article number below to view the article in the Microsoft
Knowledge Base:
Q188296 How to Disable Dr. Watson for Windows NT
For additional information about SNA Server access violations that are caused by
an invalid emulator message, click the article numbers below to view the
articles in the Microsoft Knowledge Base:
Q214491 SNA Server Access Violation in Function S1PWHSES()
Q196921 SNA Server Access Violation in Function S1PWLUSE()
Additional query words:
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Keywords : kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbsna400sp4
Technology : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ400SP4
Version : :4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4
Issue type : kbbug
Solution Type : kbfix
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