Microsoft KB Archive/161767

= Wnap.exe GP Faults During a Windows NT Password Change =

Article ID: 161767

Article Last Modified on 10/30/2003

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APPLIES TO


 * Microsoft SNA Server 2.11 Service Pack 1
 * Microsoft SNA Server 3.0 Service Pack 4

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This article was previously published under Q161767





SYMPTOMS
During a Windows NT password change, the SNA Server Windows 3.x client software may encounter a general protection fault (GPF) and display the following error:

WNAP caused a General Protection Fault in module WDMOD.DLL at 0015:038E

This problem occurs if the combined user ID and domain name field length is seven or eight characters. This problem may also lead to a buffer pool corruption error on the server, causing SnaBase to fail abnormally with the following Windows NT application event log errors:   Event: 624 Source: SNA Server Creating dump file C:\SNA\traces\snadump.log for SNABASE.EXE

Event: 686 Source: SNA Base Service SNA Server Internal buffer pool error. Reason = Invalid Owner Id    Module  = C:\SNA\system\SNABASE.EXE Process = 143 Pool   = TRUSTED ELTS Details = Current Owner Id, Correct ID NOTE: The SNA Server 2.0, 2.1 and 2.11 Windows 3.x clients do not support the Windows NT password change feature if the user's password has expired or if the user is required to change his or her password on the next logon. Password change support was added to the SNA Server Windows 3.x client software in 2.11 Service Pack 1.



CAUSE
The SNA Server client improperly generates the client logon response to send to the server when the combined user ID and domain are seven or eight characters long. In some cases, this causes an invalid message to be sent to the server, leading to an SnaBase buffer pool error.



RESOLUTION
To resolve this problem, obtain the hotfix mentioned below.



STATUS
Microsoft has confirmed this to be a problem in SNA Server version 2.11 Service Pack 1 and 3.0. A supported fix is now available, and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Additional query words: prodsna 2.11.SP1 3.00 SP1

Keywords: kbbug kbfix kbnetwork KB161767

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