unhandled exception in crdb_adoplus.dll

[Ritesh1234]

Hi Friends, I am using vs2002 and CR 9.1.In my application i have to Export the crystal report to PDF and i am able to do so using below code. Public Sub ExportToPDF() Dim rptDiskFileOptions As New DiskFileDestinationOptions() Try Dim FilePath As String FilePath = Server.MapPath(General.C_TempDownLoadPath & & "Report.pdf") '.Replace("/"c, "\") rptDiskFileOptions.DiskFileName = FilePath rptDoc = DirectCast(Cache(strCacheReport), ReportDocument) rptDoc.ExportOptions.ExportDestinationType = ExportDestinationType.DiskFile rptDoc.ExportOptions.DestinationOptions = rptDiskFileOptions rptDoc.ExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat rptDoc.Export() Response.Redirect(General.C_TempDownLoadPath & "ReportName.pdf") Catch exc As Exception Throw exc Finally rptDoc = Nothing rptDiskFileOptions = Nothing End Try End Sub Now my problem is that some time i am getting pdf file without any problem but most of the time it give me this exception. An unhandled exception of type 'System.ExecutionEngineException' occurred in crdb_adoplus.dll can anyone help me to resolved this problem. Regards, Ritesh