Error: "Installation of Primary Interop Assembly failed," when installing CCH ProSystem fx Document Drive 3.9.

Office 2010:

  • If you see this message in this environment, it can be ignored; continue on with the installation.
  • The message appears when Document Drive installer tries to install the Primary Interop Assembly component of Office 2007.
    • On machines that have Office 2010 this will fail to install, since Office 2010 already has these assemblies.

Office 2007:

  • If you see this message on machines that have Office 2007, cancel the install of Document Drive.
    1. Open Control Panel.
    2. Open Add/Remove Programs or Programs and Features.
    3. Locate and remove Microsoft Office 2007 Primary Interop Assembly.
    4. Install Document Drive again.
  • The current installation of Office Primary Interop Assembly may be damaged or corrupt.
    • The Document Drive installation may be unable to repair it.
    • Removing the PIA and allowing Document Drive to reinstall it should resolve this issue.
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