"The messaging interface has returned an unknown error" error message when you forward a message in Outlook 2000 SR-1

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This article was previously published under Q275186

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SYMPTOMS

When you try to forward a message in Microsoft Outlook 2000 Service Release 1 (SR-1), you may receive the following error message:

The messaging interface has returned an unknown error. If the problem persists, restart Outlook.

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CAUSE

This behavior occurs if the following conditions are true:

Your default delivery location is set to a Personal Folder (.pst) file or you are using Offline Folders (an .ost file).
You forward a message in Outlook Rich Text format (RTF) that includes an attachment.
You enable the message to be saved in the Drafts folder either by waiting for three minutes or by clicking Save on the File menu.
You modify the message after you save a copy in the Drafts folder.
You try to send the message or save the message by clicking Save on the File menu.

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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:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

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.IMPORTANT: Before you apply this fix, you must first apply the Microsoft Office 2000 Service Release 1 (SR-1). For additional information about the Microsoft Office 2000 Service Release 1 (SR-1) , click the following article number to view the article in the Microsoft Knowledge Base:

245025 (http://support.microsoft.com/kb/245025/ ) How to obtain and install Microsoft Office 2000 Service Release 1 (SR-1)

The English version of this fix for the secure build of Outlook should have the following file attributes or later:

   Date      Time   Size        File name     
   -----------------------------------------------
   11/20/00  20:35  24,532,244  Out2kmst_admin.msp
   11/20/00  16:10   2,489,856  Outlook.msp
   11/20/00  16:23   7,081,984  Outlook_admin.msp

After the hotfix is installed, the following files will have the listed attributes or later:

   Date      Time   Version      Size       File name     
   -----------------------------------------------------------
   14/06/00  13:11  1.0.3.27        41,472  Bjablrew.dll
   14/06/00  13:12  3.2.0.27        61,952  Bjlog32.dll
   14/06/00  13:13  1.0.3.27        93,184  Bjsrch32.dll
   07/09/00  01:16  9.0.0.4506     122,931  Contab32.dll_0002
   14/06/00  13:14  1.0.3.27       183,808  Emablt32.dll
   31/08/00  15:43  5.5.3142.0     154,112  Emsabp32.dll_0005
   25/09/00  23:23  5.5.3144.0     594,192  Emsmdb32.dll_0005
   24/08/00  00:59  5.5.3141.0     131,344  Emsui32.dll_0005
   02/06/00  06:45  9.0.0.4201      86,067  Envelope.dll
   11/10/00  20:37  5.5.3147.0     540,944  Exsec32.dll_0005
   05/04/00  15:02  9.0.0.4005     192,561  Mimedir.dll
   07/07/00  23:07  5.5.3138.0     602,384  Mspst32.dll_0004
   07/07/00  23:03  5.5.3138.0     528,656  Mspst32.dll_0005
   31/01/00  21:26  9.0.0.3731     196,661  Oladd.fae
   23/05/00  11:20                 150,690  Olexchng.aw
   30/05/00  14:53                  26,643  Olsec9.chm
   22/05/00  19:35                 170,617  Olxchng9.chm
   02/06/00  07:43  5.5.3134.0     454,144  Omi9.dll_0001
   02/06/00  07:46  5.5.3134.0     548,352  Omint.dll_0001
   28/09/00  10:46  8.30.3145.0    782,608  Outex.dll
   23/05/00  19:19                 554,068  Outlhlp.aw_0001
   19/10/00  00:49  9.0.0.4618   5,324,850  Outlib.dll
   19/10/00  00:50  9.0.0.4618   1,675,315  Outllibr.dll
   25/09/00  23:17  9.0.4525.0     368,691  Pstprx32.dll_0002
   07/07/00  14:41  9.0.0.4307      73,772  Rm.dll
   02/06/00  07:30  9.0.0.4201      65,586  Sendto9.dll
   19/06/00  14:49  5.5.2652.65    716,560  Cdo.dll
   19/06/00  14:12  5.5.2652.65    808,720  Cdo.dll_0004
   28/09/00  10:54  5.5.3145.0     792,576  Msmapi32.dll_0001
   28/09/00  10:50  5.5.3145.0     623,104  Msmapi32.dll_0002
   30/05/00  16:18                 112,128  Out2ksec.mst

This fix is also available in the following languages: