DOCUMENT:Q243759  11-NOV-2000  [exchange]
TITLE   :XCON: MTA May Stop on 9405 Errors with Access Violation
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 kbExchange550preSP4fix kbExchange550sp4Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

The Microsoft Exchange Server message transfer agent (MTA) may repeatedly stop
with the following event in the Windows NT Event Viewer:

   Event 9405:

   An unexpected error has occurred which may cause the MTA to terminate. Error:
   Access violation (0xc0000005) at Address 0x5e215a reading from 0x0. [BASE
   XFER-OUT 20] (16)

CAUSE
=====

The MTA is not properly deleting an entity control block after routing a
message.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server 5.5.
For additional information, please see the following article in the Microsoft
Knowledge Base:

   Q191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem was first corrected in Exchange Server 5.5 Service
Pack 4.

Additional query words:

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Keywords          : exc55 kbExchange550preSP4fix kbExchange550sp4Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

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