DOCUMENT:Q193818  23-SEP-1999  [sna]
TITLE   :SNA Server 3.0 Logs Repeated BIND Errors (Event 18)
PRODUCT :Microsoft SNA Server
PROD/VER:WINDOWS:3.0,3.0 SP1,3.0 SP2,3.0 SP3
OPER/SYS:
KEYWORDS:kbbuglist

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3 
-------------------------------------------------------------------------------

SYMPTOMS
========

When SNA Server 3.0 (including SP1, SP2 and SP3) sends an LU6.2 BIND request to
establish an independent LU6.2 session and the remote system rejects the BIND
request, SNA Server logs an Event 18 to the Windows NT application event log:

   Event ID: 18
   Source: SNA Server
   Description: APPC session activation failure: BIND negative response
   or UNBIND request received...

SNA Server retries the BIND request in some cases. If the remote system continues
to reject the BIND, an Event 18 is logged for every negative response received.

CAUSE
=====

SNA Server 3.0 is designed to log an Event 18 whenever a BIND negative response
is received.

WORKAROUND
==========

There is no workaround for SNA Server 3.0 systems, except to remove any Local or
Remote APPC LUs from SNA Server that are not configured on the remote system,
assuming these LUs are causing the repeated BIND errors. For SNA Server 2.11
systems, refer to the following Knowledge Base article:

   Q150959 Preventing Repeated APPC Session Activation Failures Event 18

MORE INFORMATION
================

The initial retail version of SNA Server 4.0 implements a new behavior. SNA
Server 4.0 reduces the number of Event 18 errors that are logged by only logging
the first BIND negative response for a given LU/LU/mode combination. When SNA
Server 4.0 is retrying a BIND request and receives a BIND negative response,
Event 18 is no longer logged.

Note that the SNA Server BIND retry interval defaults to 10 seconds. This
interval can be controlled by tuning the SNA Server BINDRETRY registry
parameter, described in the SNA Server Reference Guide, Chapter 8: SNA Server
Registry Settings.

If the client application attempts to allocate a conversation, causing SNA Server
to attempt a new BIND request, and the remote system rejects this BIND request,
SNA Server still logs an Event 18 for the first BIND attempt, but not subsequent
BIND retries.

Additional query words:

======================================================================
Keywords          :  kbbuglist
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ300SP2
Version           : WINDOWS:3.0,3.0 SP1,3.0 SP2,3.0 SP3
Issue type        : kbbug
Solution Type     : kbnofix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1999.