DOCUMENT:Q196394  24-APR-1999  [exchange]
TITLE   :XADM: Store Randomly Stops with Dr.Watson and c0000005 Error
PRODUCT :Microsoft Exchange
PROD/VER:WinNT:5.5
OPER/SYS:
KEYWORDS:

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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 information store generates a 'Dr. Watson' pop-up
error message and the application log will show an 'Access Violation' error
(c0000005) generated by the information store that correlates to the Dr. Watson
message. After restarting the information store or rebooting the server,
everything will appear to run normally. This event may occur at random, and may
take days or weeks to happen again (or may not happen again).

CAUSE
=====

One possible cause is a known issue in the Intel Pentium Pro 200 series of CPU
errata #59. This series of CPU can generate a Machine Check Exception in the
Instruction Fetch Unit because of its behavior when handling Exchange Store.exe
instructions. The only way to confirm the error messages were caused by this
issue is by debugging the User.dmp file generated during a Dr.Watson event.
Please contact your Microsoft Exchange Support Representative for further
instructions or troubleshooting steps.



WORKAROUND
==========

To work around this problem, contact your hardware vendor and request an updated
BIOS. Most manufacturers have a BIOS update that circumvents this problem.

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

For information about how to contact your hardware vendor, query in the
Knowledge Base for the following article:

   Q65416 Hardware and Software Third-Party Vendor Contact List, A-K

   Q60781 Hardware and Software Third-Party Vendor Contact List, L-P

   Q60782 Hardware and Software Third-Party Vendor Contact List, Q-Z

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Keywords          :  
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : WinNT:5.5
Issue type        : kbbug

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