C# - "Operation Not Implemented Yet" Error?

Jan 3, 2010

I have an asp.net web application. When I try to export a report via crystal report I get following error :Error in File C:DOCUME~1UserLOCALS~1TempMainReport {7F8A9E9E-DD47-4D17-A44D-68D9478A792C}.rpt: Operation not yet implemented.I use this code to export report :

ReportDocument reportDocument = reportSource.ReportDocument;
reportDocument.SetDataSource(dt);
Response.ClearContent();
Response.ClearHeaders();
reportDocument.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, false, "Report");

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