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Outlook mso9.dll

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I am getting an error message when I open outlook. The message reads "Outlook caused an error in mso9.dll. Outlook will now close" Does anyone have knowledge of this problem?

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by sgt_shultz

microsoft says this can be due to damaged or wrong version ms09.dll file. they say
"To resolve this problem, rename both the Outcmd.dat and Mso9.dll files, and then use the Add/Remove Programs tool to repair Outlook."
complete how-to instructions are at support.microsoft.com, search for '241817'

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