AutoCAD LT Services & Support

Error 1904 ... Flash9.ocx failed to register

Published date: 2007-Nov-14
ID: TS1069786

Applies to:
AutoCAD® 2009
AutoCAD® 2008
AutoCAD LT® 2009
AutoCAD LT® 2008

Issue

When you installed your Autodesk software application, the following error message was displayed. 

Error 1904.Module C:\Windows\system32\Macromed\Flash\Flash9.ocx failed to register.  HRESULT -2147220473

When you clicked OK, the Autodesk software application install completed successfully, but 2 versions of the Adobe Flash Player Plug-in were installed.

Solution

This error occurs because an older version of the Adobe Flash installer does not detect the newer version that is already installed. As a result both older and newer versions of the Adobe Flash Player Plug-in are installed. To resolve this issue, use one of the following methods:

If you have already installed your Autodesk software application:

  1. You can ignore the error. It will not affect the Autodesk software application installation and the one component that requires Flash will work without problems.
  2. You can clean up the dual installations of the Adobe Flash Player Plug-in by uninstalling them, and then reinstalling the latest Adobe Flash Player Plug-in. For details on removing this plug-in, you can either search Adobe's website for the Uninstall_flash_player.exe utility or contact Adobe directly for details.

To prevent this issue from happening, perform one of the procedures below before you install your Autodesk software application.

For standalone installations from the product media:

  1. Uninstall the Adobe Flash Player Plug-in, and then install the Autodesk software application. For details on removing this plug-in, you can either search Adobe's website for the Uninstall_flash_player.exe utility or contact Adobe directly for details.

For network and multi-seat standalone deployments:

  1. In the AdminImage folder for your deployment, locate the <deployment>.ini file.
  2. Open the file in a text editor, such as Notepad.
    • Note: This .ini file will be named the same as the deployment installation shortcut. Do not modify the Setup.ini file.
  3. Locate the following line of text in the <deployment>.ini file:
    • [ACAD]
      PREREQUISITE=OS;MSI;DOTNET20;DOTNETLANG;VBA;VBALANG;DIRECTX;MSXML;DWFV;FLASH;WMF;MDAC;IE
  4. Remove the reference to FLASH as shown below:
    • [ACAD]
      PREREQUISITE=OS;MSI;DOTNET20;DOTNETLANG;VBA;VBALANG;DIRECTX;MSXML;DWFV;WMF;MDAC;IE
  5. Save the file and close the text editor.
  6. Run the Autodesk product installation again.

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