The WebReady Document Viewing worker process cannot be found. To correct this problem, reinstall Outlook Web Access.

Product: Exchange
Event ID: 49
Source: MSExchange OWA
Version: 8.0
Symbolic Name: TranscodingWorkerApplicationNotFound
Message: The WebReady Document Viewing worker process cannot be found. To correct this problem, reinstall Outlook Web Access.

This Error indicates that the WebReady Document Viewing service did not open an attachment as a Web page. WebReady Document Viewing lets users access file attachments in Microsoft® Office Outlook® Web Access. Users can access common file types such as Microsoft Word documents even if the application is not installed. The event may occur if one or more of the following conditions are true:

  • The value of HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F7CC98B4-F6F5-489D-98EB-000689C721DE}\LocalServer32\(Default) is empty. Alternatively, the file referenced by this registry key is incorrect.

  • The TranscodingService.exe file is missing from the computer that is running the Client Access server role.

User Action

To resolve this error, follow one or more of these steps:

  • Verify that the correct value exists for the registry specified in the Explanation.

    • In Registry editor, under the registry subkey HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F7CC98B4-F6F5-489D-98EB-000689C721DE}\LocalServer32, double-click the registry key (Default).

    • In Value data, verify that the value specified is a path of the TranscodingService.exe file. The default location of the file and the registry key value is C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\bin\DocumentViewing\TranscodingService.exe.

  • Verify that the TranscodingService.exe file exists in the location that is specified in the registry. If it does not exist, copy that file from the \Setup\ServerRoles\ClientAccess\owa\bin\DocumentViewing folder on the Microsoft Exchange Server 2007 DVD, and then paste it to the Client Access server. The default location to replace the file on the client Access server is C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\bin\DocumentViewing.

  • Remove and then re-install the Client Access server role. For more information about how to modify server roles, see Removing and Modifying Exchange 2007.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.


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