1455942 - Error "Retrieving the COM class factory for component with CLSID {D7F5D7C3-B06C-4CAC-BC47-A06E66D2EE9B} failed due to the following error: 80000003."

• Using the Crystal Reports .NET SDK to create a new instance of a ReportDocument.
• Error: Retrieving the COM class factory for component with CLSID {D7F5D7C3-B06C-4CAC-BC47-A06E66D2EE9B} failed due to the following error: 80000003.

System.Runtime.InteropServices.COMException was unhandled by user code
  Message="Retrieving the COM class factory for component with CLSID {D7F5D7C3-B06C-4CAC-BC47-A06E66D2EE9B} failed due to the following error: 80000003."
  Source="CrystalDecisions.CrystalReports.Engine"
  ErrorCode=-2147483645
  StackTrace:
       at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.CreateRptDoc()
       at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper..ctor()
       at CrystalDecisions.CrystalReports.Engine.ReportDocument.Initialize()
       at CrystalDecisions.CrystalReports.Engine.ReportDocument..ctor()
       at _Default.ConfigureCrystal() in c:\Inetpub\wwwroot\reportingApp\Default.aspx.cs:line 26
       at _Default.Page_Load(Object sender, EventArgs e) in c:\Inetpub\wwwroot\reportingApp\Default.aspx.cs:line 17
       at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
       at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
       at System.Web.UI.Control.OnLoad(EventArgs e)
       at System.Web.UI.Control.LoadRecursive()
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException: 

• Crystal Reports 2008, SP2
• Visual Studio 2008

CrystalDecisions.CrystalReports.Engine.ReportDocument boReportDocument = new CrystalDecisions.CrystalReports.Engine.ReportDocument();

• The {D7F5D7C3-B06C-4CAC-BC47-A06E66D2EE9B} is the GUID for clientdoc.dll.
• The clientdoc.dll COM library has become unregistered on the system.

0. Go to Start > Run. Then type in:

regsvr32 "C:\Program Files\Business Objects\BusinessObjects Enterprise 12.0\win32_x86\clientdoc.dll"

0. Click OK.
0. Restart the application server, or the entire server for the change to take effect.

KBA , BI-DEV-NET , BI Software Development Kits (SDKs) - .NET or Other , Problem