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Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Core.IRibbonUI.'

Hello everybody. I have a user on Windows 7 and Office 2010. He receives the following error when using OnePlaceMail:

Error: Unable to cast COM object of type 'System._ComObject' to interface type 'Microsoft.Office.Core.IRibbonUI'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000C03A7-0000-0000-C000-000000000046}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPEE_LIBNOTREGISTERED)).

I found this post (https://feedback.oneplacesolutions.com/forums/589411-oneplacemail-desktop/suggestions/18223252-com-error-in-ops-lite-when-moving-emails-to-folder) and it says that this bug is resolved. But I cannot find the solution anywhere in this post.

A support engineer has already run an Office repair and has also re-installed OnePlaceMail, but the error keeps coming back. Is it necessary to completely un-install Office and OnePlaceMail and re-install them again? Or is this an issue with Office 2010? Or is there another solution? Thanks in advance for all your help.

With kind regards, Richy

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Richy Mangoendirjo shared this idea  ·   ·  Report…  ·  Admin →
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  • Kat commented  ·   ·  Report

    Hi there,

    I also have this issue, would you be able to email me the solution?

    Thank you

    Kat

  • Benoit Leguillier commented  ·   ·  Report

    Hello,

    I'm facing the same issues for some users with Outlook 2013 (works fine with Outlook 365).
    Would it be possible to know what the registry keys to update ?

    Many thanks in advance and kind regards,

    Benoit

  • Stephen Carrier commented  ·   ·  Report

    Hello,

    I am having the same issue. Is there a solution available?

    Thanks very much.

    Steve

  • Mark commented  ·   ·  Report

    Hi Elissa,

    I have a user getting the same issue, would you be able to send me through the resolution steps too please?

    Many thanks
    Mark

  • AdminElissa C (Admin, OnePlace Solutions) commented  ·   ·  Report

    Hi Richy

    Thanks for your comment.

    The root issue of this error is that the version reference for a key in the registry is pointing to an incorrect value.

    For simplicity, I will email you these steps to resolve this issue.

    kind regards
    Elissa

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