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Error: 'Unable to cast COM object of type 'Redemption.RDOPstStoreClass' to interface type 'Redemption.IRDOPstStore'' When Exporting to PST

Author: Luis Fernandes Updated

Overview

This article describes the issue and its resolution when exporting emails into a PST file using the Import Export tool, you may receive the following error:

Unable to cast COM object of type 'Redemption.RDOPstStoreClass' to interface type 'Redemption.IRDOPstStore'. This operation failed because the QueryInterface call on the COM component for the interface with ID {xxxx} failed due to the following error: Library not registered.

Environment

  • GFI MailArchiver 2013 R2 or older
  • All supported environment

Root Cause

The redemption.dll file is not registered correctly.

Resolution

  1. Open the command prompt (elevated) and change directory to:
    • 32-bit OS: ..\Program Files\Common Files\GFI\common
    • 64-bit OS: ..\Program Files (x86)\Common Files\GFI\common
  2. Run the following command: regsvr32 -u redemption.dll
  3. Run the following command: regsvr32 redemption.dll
  4. Run services.msc on the server.
  5. Restart all of the GFI MailArchiver services.

Note: This feature requires Microsoft Outlook. For details, please refer to GFI Archiver's Microsoft Outlook or CDO/MAPI requirements.