Blank second page and export error in Crystal 10 Web Report Viewer

Question

We have a customer that is having 2 issues viewing an .rpt file in the Crystal 10 Web Report Viewer.  When they view a report that is 12 pages, the first page appears OK.  When they click Next to go to the Next page, the page shows as blank.  The second issue is that If they try to export the .rpt they get this error:
Exception Details: System.Runtime.InteropServices.COMException: Access denied Error in File UNKNOWN.RPT:
Access to report file denied. Another program may be using it.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack trace:
[COMException (0x80000220): Access denied.
Error in File UNKNOWN.RPT:
Access to report file denied. Another program may be using it.]
      CrystalDecisions.ReportAppServer.Controllers.ReportSourceClass.Export (ExportOptions pExportOptions, RequestContext pRequestContext) +0
CrystalDecisions.ReportSource.ErrorReportSourceBase.ExportToStream(ExportRequestContext reqContext) +133
[LoadSaveReportException: Access denied.
Error in File UNKNOWN.RPT:
Access to report file denied. Another program may be using it.]
CrystalDecisions.ReportAppServer.ConvertDotNetToErom.ThrowDotNetException(Exception e) +661
CrystalDecisions.ReportSource.ErrorReportSourceBase.ExportToStream(ExportRequestContext reqContext) +186
CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExplortRequestContext reqContext) +20
I can view and export the same .rpt file in my environment without any issues.  Has anyone seen these errors before and have any ideas on how to resolve them?  They seem to be environment related since I can view the same report OK on my machine.
This is using Crystal 10 on Windows Server 2003.

Answer 1

Hello,
This sounds like a postback issue. Does your application handle postback by putting the report in session?
There is a [sample|http://devlibrary.businessobjects.com/BusinessObjectsXIR2SP2/en/en/CrystalReports_dotNET_SDK/crsdk_samples_aspx/data/crsdk_net_tutorials_115_en.zip] to look at on our website. It was created with Crystal Reports XI R2 and Visual Studio .NET but the code will be the same.
The basic code is:
Private crReportDocument As ReportDocument
    Private Sub ConfigureCrystalReports()
        'Check to see if the report exists
        If (Session("crReportDocument") Is Nothing) Then
            crReportDocument = New ReportDocument()
            crReportDocument.Load("C:\1 - Report\CRParams.rpt")
            'Do anything required for the report
            'Logon to the database
            'Pass parameters
            'Assign the report into Session
            Session("crReportDocument") = crReportDocument
            'Assign the report to the Viewer
            myCrystalReportViewer.ReportSource = crReportDocument
        Else
            'Assign the report that is stored in Session to the report instance.
            crReportDocument = CType(Session("crReportDocument"), ReportDocument)
            'Assign the report to the Viewer for each postback
            myCrystalReportViewer.ReportSource = crReportDocument
        End If
    End Sub
Elaine