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Q241138: SNA Server Windows 3.x Client Causes Access Violation

Article: Q241138
Product(s): Microsoft SNA Server
Version(s): 3.0,3.0 SP1,3.0 SP2,3.0 SP3,3.0 SP4,4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4
Operating System(s): 
Keyword(s): 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 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, 4.0 SP4 
- Microsoft Host Integration Server 2000 
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SYMPTOMS
========

The SNA Server Windows 3.x client software (Wnap.exe and Win3270.exe) may fail
with an Access Violation error in the following configurations:

- When you install on a computer running Windows 98 Second Edition

- After you install Microsoft Internet Explorer 5 on Windows 98, where the SNA
  Win 3.x client had been working with no problems prior to the upgrade to
  Internet Explorer 5

On computers running Windows 98, the Access Violation error message may be
similar to the following:

  WNAP caused a general protection fault
  in module WNAP.EXE at 0005:00000a10.
  Registers:
  EAX=ffff2864 CS=2eb7 EIP=00000a10 EFLGS=00000246
  EBX=014f2864 SS=2e87 ESP=000025ca EBP=000025de
  ECX=00000000 DS=2e87 ESI=00022d50 FS=2e7f
  EDX=00002f2f ES=2f2f EDI=00002e6f GS=0000
  Bytes at CS:EIP:
  ff 1e c4 0c c4 1e 2c 01 26 c7 87 35 27 02 00 b8

Stack dump:

  28642eef 2d502f2f 62002e6f 28648928 2e872f2f 043425fd 2eef2ec7
  2e6f2d50 00000200 00032f2f 2e872622 2eef0b90 270f2e87 17d79e9d
  00000000 00100000

CAUSE
=====

When you run the SNA Windows 3.x client on the above Windows 98 configurations,
the SNA client components are exhausting their local program stack space, which
results in unexpected failures in the SNA client components.

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.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on 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.




WORKAROUND
==========

If the problem started to occur after you installed Microsoft Internet Explorer
5, to work around the problem, remove Internet Explorer 5 and install a previous
version of Internet Explorer.


STATUS
======

Microsoft has confirmed this to be a problem in SNA Server 3.0, 3.0 SP1, 3.0
SP2, 3.0 SP3, 3.0 SP4, SNA 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, and 4.0 SP4.

This problem was correctd in Host Integration Server 2000.

Additional query words:

======================================================================
Keywords          : sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbsna400sp4 
Technology        : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ300 kbSNAServ400 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ400SP4 kbSNAServ300SP2 kbSNAServ300SP4
Version           : :3.0,3.0 SP1,3.0 SP2,3.0 SP3,3.0 SP4,4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4
Issue type        : kbbug
Solution Type     : kbfix

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