Article ID: 820367 - View products that this article applies to.
When you try to reply to an e-mail message you receive that was sent by using the "Have Replies Sent to" option, you may receive the following error message:
When you click to view the details of the error message, you find that the error occurred in the Mso.dll file.
Microsoft Outlook has encountered a problem and needs to close. We are sorry for the inconvenience.
This problem may occur if the following conditions are true:
Service Pack InformationThis problem is corrected in Office XP Service Pack 3.To resolve this problem, obtain the latest service pack for Microsoft Office XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/307841/ )How to obtain the latest Office XP Service Pack
Hotfix InformationA 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:
http://support.microsoft.com/contactus/?ws=supportNote 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.
The global version of this fix has the file attributes (or later) 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 tool in Control Panel.
After the hotfix is installed, the following files will have the listed attributes or later:
Date Time Size File name -------------------------------------------- 10-May-2003 05:48 3,231,668 Outlookop.msp (Client Patch) 10-May-2003 08:25 6,988,428 Outlookff.msp (Full File Patch)
This fix is a post-Office XP Service Pack 2 (SP-2) fix. To install the fix, you must have Office XP SP-2 installed. For additional information about Office XP SP-2, click the following article number to see the article in the Microsoft Knowledge Base:
Date Time Version Size File name ------------------------------------------------------- 20-Dec-2002 00:41 10.0.4817.0 109,128 Envelope.dll 09-Jan-2003 22:31 10.0.4907.0 346,696 Exsec32.dll 09-Aug-2002 03:22 10.0.4406.0 137,800 Impmail.dll 28-Feb-2003 01:56 10.0.5025.0 543,304 Outlcm.dll 14-Mar-2003 07:55 10.0.5112.0 100,936 Outlctl.dll 08-May-2003 21:08 10.0.5306.0 6,318,664 Outllib.dll 11-Oct-2002 22:14 10.0.4608.0 92,744 Outlmime.dll 08-May-2003 21:08 10.0.5306.0 47,688 Outlook.exe 22-Mar-2003 03:06 10.0.5119.0 121,416 Outlph.dll 25-Nov-2002 18:50 10.0.4721.0 47,688 Recall.dll
325671Additionally, you may have to install Windows Installer 2.0 to install this fix. For additional information about the Windows Installer requirement for post-Office XP SP-2 fixes, click the following article number to see the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/325671/EN-US/ )OFFXP: Overview of the Office XP Service Pack 2
(http://support.microsoft.com/kb/330537/EN-US/ )OFFXP: Office XP Updates and Patches Released After September 2002 May Require Windows Installer 2.0
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Office XP Service Pack 3.
Contact us for more help
Connect with Answer Desk for expert help.