SNA Server Logs Event 579, 699 Followed by Connection Failure

 Last reviewed: April 17, 1997
Article ID: Q158211

The information in this article applies to:
  • Microsoft SNA Server for Windows NT versions 2.1, 2.11, and 2.11 Service Pack 1

SYMPTOMS

An SNA Server connection changes from Active to Inactive status and cannot be reactivated. This causes all users who are using this connection to lose their sessions. The following events are logged in the Microsoft Windows NT Application Event Log (in the following order): 

   Event ID: 579
   Source: SNA Server
   Description: Source and destination incompatibility, Message = <aa,bb>,
                Parameters = <cc,dd>

   Event ID: 699
   Source: SNA Server
   Description: Invalid message: MsgType 16, MhType 1
                Message Header: <data>
The following events may also be logged, following the 579 and 699 errors: 

   Event ID: 360
   Source: SNA Server
   Description: (B4A) Unexpected error logged

   Event ID: 39
   Source: SNA Server
   Description: Connection <name> failed: No link service available
NOTE: This problem occurs more frequently when you connect over the SNA Server NetWare IPX/SPX client interface.

CAUSE

If the SNA Server receives notification that an SNA client LAN session has ended, at the same time when a message is being sent to an SNA Server link service, an internal SNA Server addressing problem occurs, causing the underlying link service to fail.

STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server versions 2.1, 2.11, and 2.11 Service Pack 1. 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: sp1 prodsna
Keywords : kbbug2.10 kbbug2.11 kbbug2.11.sp1 kbnetwork prodsna snadlc
Version : 2.1 2.11 2.11.sp1
Platform : WINDOWS
Issue type : kberrmsg

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Last reviewed: April 17, 1997
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