Microsoft KB Archive/150304

= SNA Server Admin Application Exception When Use Banyan Vines =

Article ID: 150304

Article Last Modified on 11/26/2003

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APPLIES TO


 * Microsoft SNA Server 2.1, when used with:
 * Microsoft Windows NT 4.0
 * Microsoft SNA Server 3.0, when used with:
 * Microsoft Windows NT 4.0
 * Microsoft SNA Server 2.11 Service Pack 1, when used with:
 * Microsoft Windows NT 4.0

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This article was previously published under Q150304





SYMPTOMS
When you exit the SNA Server Admin, you may get an application exception if the SNA Server is installed on a Microsoft Windows NT Server running the Banyan Vines version 5.56(30) redirector. The application exception is similar to the following:

snaadmin.exe - application error

The instruction at "0x77f8d637" referenced memory at "0x00000010". The memory could not be "written".

Click OK to terminate the application.

In addition, SNA Server logs the following message in the Application Event log:

Event ID: 560

Source: SNA Base Service

Description: Read from mailslot failed, rc = 165



CAUSE
The application exception occurs when SNA Server Admin tries to close a Vines socket from the Client/Server interface's detach entry point.

The Event 560 message is caused because the 5.56(30) version of the Banyan Vines redirector returns a different error code on the VnsSocketReceive API than earlier versions when the socket is closed.

These two problems did not occur with previous versions of the Banyan Vines redirector.



RESOLUTION
Snadmod.dll and Snabv.dll have been updated so that the Vines socket is closed before the Client/Server interface's detach entry point is called.



STATUS
Microsoft has confirmed this to be a problem in SNA Server versions 2.1, 2.11, and 2.11.sp1. This problem was corrected in the latest Microsoft SNA Server 2.11 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodsna trap drwtsn32

Keywords: kbbug kbfix kbnetwork KB150304

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