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Interface Not registered - Word Mail Merge from Delphi Latest Windows update

Anonymous
2024-12-06T15:52:42+00:00

We support a Delphi 10.2 Application which uses OLE to Open a Desktop Word Document and perform Mail Merges - Its worked for many years but the latest Windows 11 update is causing the 'Interface Not Registered Error' - This is causing us major headaches as the updates to Windows are being rolled out automatically

Word For Office 365 Version 2409 build 16

Windows 11 Pro 26100.1

Any help or advice would be really appreciated

Microsoft 365 and Office | Word | Other | Windows

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  1. Anonymous
    2024-12-07T06:26:01+00:00

    Hi Antony Everington

    Welcome to Microsoft Community.

    I realize that you've encountered a problem with " Interface Not registered ", and I understand how you feel. Don't worry, I'll do my best to help you.

    "Interface not registered" error is usually related to OLE automation's COM interface and may be caused by Windows updates or Office updates. Here are some suggestions to resolve this issue:

    • Register COM Components Ensure that Word's COM components are correctly registered. You can try manually registering Word's DLL files: Open Command Prompt （run as administrator）.
      1. Enter the following command and press Enter: regsvr32 "C:\Program Files\Microsoft Office\root\Office16\winword.exe"
      Adjust the command according to your installation path.
    • Check Delphi Code Ensure that the OLE interface references in Delphi are correct. Check if your code uses the correct version of the Word type library. If you are using an earlier version of the Word type library, you may need to update to the current version.
    • Update Delphi Components Ensure that the version and components of Delphi you are using are up to date. Check for available updates or patches to resolve compatibility issues with Windows 11 and Office 365.
    • Rollback Windows Update If the above methods do not resolve the issue, you can consider rolling back to the previous version, as you mentioned, this should be a compatibility issue with the new version: Open Settings > Update & Security > Windows Update. Click View update history and then select Uninstall updates. Find the recent updates and uninstall them. Then turn off Windows automatic updates and wait for the new version to be compatible with OLE before updating again.

    Feel free to share updates with me on how things are progressing after you've completed the aforementioned steps. Should you have any questions or require clarification, do not hesitate to reach out to me. I‘d like to do my utmost to assist you.

    Best regards

    Adrian.C-MSFT | Microsoft Community Support Specialist

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