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Access violation occurs in the MSMQ service

This article has been archived. It is offered "as is" and will no longer be updated.
When you run the Microsoft Message Queuing (MSMQ) service, you may receive an "Access Violation" error message, and a message that is similar to the following may be logged in the event log:

Source: Service Control Manager
Event Category: None
Event ID: 7031
Date: Date
Time: Time
User: N/A
Computer: ServerName
Description: The Message Queuing service terminated unexpectedly. It has done this 1 time(s).

This problem may occur when one of the following conditions is true:
  • You use a network address translation (NAT) firewall. Message Queuing cannot be used with a NAT firewall.
  • Your computer changes its IP address when you start your computer.
  • You have multiple clients that use same Message Queuing GUID because the operating system was cloned or ghosted without using the System Preparation tool (Sysprep.exe).
Message Queuing transactional messages (exactly one time and in-order delivery) are based on sequence IDs (SEQIDs). In this case, the SEQID was never sent from the computer that is associated with the SEQID. Instead of rejecting the acknowledgement as not valid, the sending system tries to process the acknowledgment as valid. This corrupts internal Message Queuing lists and eventually causes the access violation. The hotfix that is described in the "Resolution" section of this article rejects the acknowledgement. Therefore, it prevents the access violation. This hotfix only prevents the access violation.

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


No prerequisites are required.

Restart Requirement

You must restart your computer after you apply this hotfix.

Hotfix Replacement Information

This hotfix does not replace any other hotfixes.

File Information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
   Date         Time   Version     Size    File name   ---------------------------------------------------   16-Oct-2003  17:28  281,360  Mq1repl.dll   20-Sep-2003  17:23   14,096  Mq1sync.exe   02-Oct-2003  19:21   76,016  Mqac.sys   16-Oct-2003  17:28  217,360  Mqads.dll     20-Sep-2003  17:23   25,360  Mqbkup.exe    16-Oct-2003  17:28   76,560  Mqdscli.dll   16-Oct-2003  17:28   42,256  Mqdssrv.dll   20-Sep-2003  17:23   98,064  Mqmig.exe     16-Oct-2003  17:28  265,488  Mqmigrat.dll   16-Oct-2003  17:28  222,480  Mqoa.dll    16-Oct-2003  17:28   10,000  Mqperf.dll     16-Oct-2003  17:28  433,936  Mqqm.dll       16-Oct-2003  17:28  102,672  Mqrt.dll       16-Oct-2003  17:28   70,928  Mqsec.dll      16-Oct-2003  17:28  400,656  Mqsnap.dll     16-Oct-2003  17:28   23,824  Mqupgrd.dll    16-Oct-2003  17:28  110,864  Mqutil.dll     16-Oct-2003  17:28   64,784  Msmq.cpl   09-Oct-2003  00:18      6,656  Spmsg.dll      09-Oct-2003  00:19    140,800  Spuninst.exe   09-Oct-2003  00:19     22,016  Spcustom.dll 
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 830639 - Last Review: 10/26/2013 07:24:00 - Revision: 4.0

Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Advanced Server

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