SNA Server Logs Event 579, 699 Followed by Connection Failure (158211)

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