RSSError Message: Cannot start Microsoft Office Outlook.
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Converting to or from
Outlook or Exchange:
Messages and Calendar
or
Address books
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I'm not sure what is causing the problem, but we're seeing a rash of complaints with the following error:
"Cannot start Microsoft Office Outlook. Unable to open the Outlook window"
The users run Office Diagnostics in an attempt to fix it on their own but it finds no errors.
To fix this you need to close Outlook and reopen it using the /resetnavpane switch or find and delete <profile_name>.xml and restart Outlook. Outlook will recreate a new file with the default navigation pane folders. You will lose any customizations on the navigation pane, such as folders on the Favorites folder list
How to use the /resetnavpane switch
Close
Outlook. At the Start search field on Vista or Windows7
Start menu or in the Start menu, Run command
(Windows key + R), type
outlook.exe /resetnavpane
Then press Enter (or OK button) to restart Outlook.
Note: Make sure there is a space between the words.
Delete the Navigation pane configuration file
If you are having problems using the switch, you can find and delete the XML file that holds the navigation pane settings. In the Start search or Run fields or in Windows Explorer's address bar, paste the following and press Enter:
This will open Windows Explorer to the folder where many of Outlook config files are kept. Find and delete the file named for your profile with the extension XML. Note that we highly recommend using the switch instead of deleting the file directly.
From Outlook-tips.net:
See Error with the To-Do Bar's Task list if the error is "The operation failed. An object could not be found."