Crystal Report Export To PDF Error : Operation not yet implemented

Hi,

We are facing an issue while exporting Crystal Reports to PDF in Windows 2003 R2 Server. The Error Message is : Operation not yet implemented.

We have gone through the following different solutions available inthe internet:
1. Provide permission for Network Service and Aspnet users to the Temp folders and other required folders.
2. Register Export related dlls ( ExportModeller.dll, CrtSlv.dll, atl.dll, etc. )
3. Verify the Font availability in the System. (We are using Microsoft Sans Serif and Arial only in our crystal reports)
4. Provided full trust in the config file.
5. Setup a client server application to generate the same report and it is working.

The problem seems to be with some permission or policies for web applications. The knowledge base articles from BO (Business Objects) are also not available on the internet after BO were absorbed by SAP.

Please see the error screenshot below.

Error in File C:\windows\Temp\REportVendor {9F0FC3C9-35B5-432A-A96B-306417EC5E38}.rpt:
Operation not yet implemented.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: Error in File C:\windows\Temp\REportVendor {9F0FC3C9-35B5-432A-A96B-306417EC5E38}.rpt:
Operation not yet implemented.

Source Error:

Line 60: catch(Exception ex)

Line 61: {
Line 62:  throw;
Line 63: }
Line 64:     }

[COMException (0x800003e7): 
Error in File C:\windows\Temp\REportVendor {9F0FC3C9-35B5-432A-A96B-306417EC5E38}.rpt:
Operation not yet implemented.]
   CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass.Export(ExportOptions pExportOptions, RequestContext pRequestContext) +0
   CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext) +260

[InternalException: 
Error in File C:\windows\Temp\REportVendor {9F0FC3C9-35B5-432A-A96B-306417EC5E38}.rpt:
Operation not yet implemented.]
   CrystalDecisions.ReportAppServer.ConvertDotNetToErom.ThrowDotNetException(Exception e) +700
   CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext) +315
   CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExportRequestContext reqContext) +676
   CrystalDecisions.CrystalReports.Engine.FormatEngine.Export(ExportRequestContext reqContext) +214
   CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToDisk(ExportFormatType formatType, String fileName) +266
   _Default.Page_Load(Object sender, EventArgs e) in c:\disco\Default.aspx.cs:62
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +34
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +47
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061

The Error is throwing on this line

 rptDoc.ExportToDisk(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat,@"C:\VendorReportNew.pdf");

If any one faced on this issue in your experience, please share with me.

Thanks in Advance,

Rajesh