DOCUMENT:Q157701  09-APR-1999  [exchange]
TITLE   :XCON: MTA: Dr. Watson Report with Exception e0020002
PRODUCT :Microsoft Exchange
PROD/VER:winnt:4.0
OPER/SYS:
KEYWORDS:kbusage

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The information in this article applies to:

 - Microsoft Exchange Server, version 4.0 
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SYMPTOMS
========

The Microsoft Exchange Message Transfer Agent (MTA) generates a Dr. Watson
report with the exception number e0020002. The following events are reported in
the Application Log of the Windows NT Event Viewer:

   Event ID: 9225
   Source: MSExchangeMTA
   Type: Warning
   Category: Internal Processing

   Description:
   A sockets error was detected. Bad message type 1 for socket control block 42
   in state 4.
   [BASE IL TCP/IP DRVR 11 262] (14)

   Event ID: 9405
   Source: MSExchangeMTA
   Type :Error
   Category: Field Engineering

   Description:
   An unexpected error has occurred which may cause the MTA to terminate. Error:
   SBPDSCLS:CB TID=0,calling TID=1.
   [BASE TCP/IP DRVR 11] (16)

   EventID: 9405
   Source:MSExchangeMTA
   Type:Error
   Category:Field Engineering

   Description:
   An unexpected error has occurred which may cause the MTA to terminate. Error:
   Exception e0020002 occurred at Address 77f3cbcd. [BASE TCP/IP DRVR 11] (16)

   EventID: 4097
   Source:DrWatson
   Type:Information
   Category:None

   Description:
   The application, emsmta.DBG, generated an application error. The error
   occurred on 11/ 8/1996 @ 6:23:39. 0 The exception generated was e0020002 at
   address 77f3cbcd (<nosymbols>)

CAUSE
=====

The MTA was attempting to close a Control Block (an MTA resource) with a thread
different than the one used to create the Control Block.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. This problem was corrected in the latest Microsoft Exchange 4.0
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


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

This problem can occur with either TCP/IP or TP4 as the underlying transport
stack for an X.400 Connector.


Additional query words:

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Keywords          : kbusage 
Technology        : kbExchangeSearch kbExchange400 kbZNotKeyword2
Version           : winnt:4.0
Issue type        : kbbug
Solution Type     : kbfix

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