Article ID: 240813 - View products that this article applies to.
This article was previously published under Q240813
This article has been archived. It is offered "as is" and will no longer be updated.
When you attempt to send e-mail from a Microsoft Office program, Microsoft Internet Explorer, or any program that supports the Simple Messaging Applications Program Interface (MAPI) transport, you may receive the following error message:
If you click Details, the following additional information displays:
This program has performed an illegal operation and will be shut down.
If the problem persists, contact the program vendor.
Outlook caused an invalid page fault in module Mso9.dll at <address>.
You installed the Outlook Personal Folders Backup Utility, and Outlook was not running at the time you attempted to send the message.
The error message sequence in the "Symptoms" section will be followed by one of the following depending on the selection made on the Send To menu:
For additional information about the Personal Folders Backup Utility, please click the article number below to view the article in the Microsoft Knowledge Base:
238782For additional information about other causes of invalid page faults occurring in module Mso9.dll, please click the article numbers below to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/238782/EN-US/ )OL2000: How to Automatically Backup Your Personal Folders File
(https://support.microsoft.com/kb/223607/EN-US/ )OL2000: (CW) Fatal Error Linking File to Contact from Word
(https://support.microsoft.com/kb/241817/EN-US/ )Invalid Page Fault in Module Mso9.dll