Log On Failed. COMException (0x80000000): No Error.

Question

Version of Crystal Reports Designer: 12.0.0683
Visual Studio 2005
OS Vista Ultimate
I have designed a report that uses an XML file as a data source.  In the deigner, the connection I am using is XML and Web Serivces.  I specify the XML and the schema file.
I have a Windows application that creates a dataset from an XML file and sets it as the report's data source. 
After I run VerifyDatabase I get the following error:
Log on failed., System.Runtime.InteropServices.COMException (0x80000000):
No error.
   at CrystalDecisions.ReportAppServer.ClientDoc.ReportClientDocumentClass.VerifyDatabase()
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.VerifyDatabase()
   at CrystalDecisions.CrystalReports.Engine.ReportDocument.VerifyDatabase()
Here is my code:
        Try
            Dim PathToDB As String = mReportLog
            Me.crPrinterUse = New AXIARReports
            Dim ds As Data.DataSet = clsDataSet.ReportDataSet(PathToDB)
            Me.crPrinterUse.SetDataSource(ds)
            Me.crPrinterUse.Database.Tables(0).SetDataSource(ds.Tables(0))
            Dim SubReport As CrystalDecisions.CrystalReports.Engine.ReportDocument
            For i As Integer = 0 To Me.crPrinterUse.Subreports.Count - 1
                SubReport = Me.crPrinterUse.Subreports(i)
                SubReport.SetDataSource(ds)
                SubReport.Database.Tables(0).SetDataSource(ds.Tables(0))
            Next
            Me.crPrinterUse.VerifyDatabase()
            Me.crv.ReportSource = Me.crPrinterUse
        Catch ex As Exception
            MessageBox.Show("Error setting report data: " & ex.Message & vbLf & "Check the log file for more details.", _
                "Report Data Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            cGlobal.Log("Error setting report data: " & ex.Message & ", " & ex.InnerException.ToString)
            Throw New Exception(ex.Message)
        End Try
I ran the modules appliacation and noticed that the development machine version is slightly different from the deployed machine.
Version of file on the deployed machine: 12.0.0.840
Could this be causing my porblem?  If so, how do I solve this?
I also have VS 2008 installed on my machine.
Thanks,
Karen

Answer 1

Thanks for your reply Ludek.
I performed the steps in your blog.  Using the XML file that the data set creates with the embeded schema gives me no mapping errors.
I simplifiied my report to the simplest form, just a few fields in the details. I simplified the XML source file to just two records and found that the report is loading the data file in the connection used at design time.  I have checked off Save Data with Report.  So there must be some step that I am missing so that the report at runtime accepts the data set as the new data an not attempt to connect.
I will review my code again and see if there is something essential that I missed.  I will report back.
Karen