Crystal Reports Missing Parameter Values - vb.net

Question

I am running the version of crystal that comes with Visual Studio 2010. I have a report that has three sub reports. There are parameters that are passed from the main report to the sub-reports. I am able to run the report in the development environment by clicking on Main Report Preview.
The problem is when I try to execute it at run time. I get the error “Missing parameter values”. I need some hints as to how to debug this problem. The error doesn’t tell you which parameter is the problem or which sub-report is involved.
Any hint will be appreciated.
I am editing this to respond to some of the questions. I am using subreports links which is where I think the problem might be. In the pass by fiddling with the settings I was able to get it to work. It seems like it was just trial and error.
I am posting a portion of the code here based on the request in the comments
Public Function GetReportOutput(iDatabaseIndicator As eDatabaseIndicatorEnum, ReportName As String, ReportOutputtype As eReportOutputtype, ReportParameters As System.Collections.Generic.List(Of clsReportParam)) As clsReturn Implements IsvcEDReports.GetReportOutput
Dim l_crRep As New CrystalDecisions.CrystalReports.Engine.ReportDocument
Dim l_clsReturn As clsReturn = New clsReturn
Dim l_ExportFormatType As ExportFormatType
Dim l_strReport As String = ""
Dim l_strReportName As String = ""
Dim l_strOutputFile As String = ""
Dim l_strFullPathName As String = ""
Dim l_strReportOutputPath As String = ConfigurationManager.AppSettings.Get(IIf(ConfigurationManager.AppSettings.Get("Environment") = 1, "ReportOutputPath_Dev", "ReportOutputPath_Prod"))
Dim l_strReportPath As String = ConfigurationManager.AppSettings.Get(IIf(ConfigurationManager.AppSettings.Get("Environment") = 1, "ReportPath_Dev", "ReportPath_Prod"))
Dim l_udtReport As CrystalDecisions.CrystalReports.Engine.ReportDocument = Nothing
Dim l_intCount As Integer = 0
Dim l_fsReturn As FileStream = Nothing
Dim l_binFilestream As BinaryReader = Nothing
Dim l_bytFile As Byte() = Nothing
Dim l_expOptions As New CrystalDecisions.Shared.ExportOptions
Dim l_expExcFmtOptions As New CrystalDecisions.Shared.ExcelFormatOptions
Dim l_tblParameters As New DataTable("Parameters")
Dim l_aryParams(1)
Dim udtSubReport As ReportDocument
Dim udtSubReportOpened As ReportDocument
Try
iDatabaseIndicator = iDatabaseIndicator
InitDataController(iDatabaseIndicator)
m_strReport = (l_strReportPath & "\" & ReportName)
l_strReportName = ReportName
l_strReport = m_strReport
l_strOutputFile = Regex.Replace(ReportName, " ", "_") & "_" & Format(Now(), "MMddyyyy_hhmmss")
m_strOutputFilename = l_strOutputFile
With l_crRep
.Load(l_strReport, CrystalDecisions.Shared.OpenReportMethod.OpenReportByDefault)
If .IsLoaded Then
For Each udtSubReport In .Subreports
udtSubReportOpened = .OpenSubreport(udtSubReport.Name)
SetDatabase(udtSubReportOpened, False)
SetParameters(udtSubReportOpened, ReportParameters, False)
Next
SetDatabase(l_crRep)
SetParameters(l_crRep, ReportParameters)
Select Case ReportOutputtype
'Case eReportOutputtype.rptOutputType_RPT
' l_strOutputFile = l_strOutputFile & ".rpt"
' l_ExportFormatType = ExportFormatType.CrystalReport
Case eReportOutputtype.rptOutputType_XLS
l_strOutputFile = l_strOutputFile & ".xls"
'ReportOutputFile = ReportOutputFile & ".xls"
With l_expExcFmtOptions
.ExcelConstantColumnWidth = 125
.ExcelUseConstantColumnWidth = True
End With
With l_expOptions
.ExportFormatOptions = l_expExcFmtOptions
End With
l_ExportFormatType = ExportFormatType.Excel
Case eReportOutputtype.rptOutputType_PDF
l_strOutputFile = l_strOutputFile & ".pdf"
' ReportOutputFile = ReportOutputFile & ".pdf"
l_ExportFormatType = ExportFormatType.PortableDocFormat
Case eReportOutputtype.rptOutputType_DOC
l_strOutputFile = l_strOutputFile & ".doc"
' ReportOutputFile = ReportOutputFile & ".doc"
l_ExportFormatType = ExportFormatType.WordForWindows
Case eReportOutputtype.rptOutputType_CSV
l_strOutputFile = l_strOutputFile & ".csv"
' ReportOutputFile = ReportOutputFile & ".csv"
l_ExportFormatType = ExportFormatType.CharacterSeparatedValues
Case eReportOutputtype.rptOutputType_TXT
l_strOutputFile = l_strOutputFile & ".txt"
' ReportOutputFile = ReportOutputFile & ".txt"
l_ExportFormatType = ExportFormatType.Text
Case eReportOutputtype.rptOutputType_XML
l_strOutputFile = l_strOutputFile & ".xml"
' ReportOutputFile = ReportOutputFile & ".xml"
l_ExportFormatType = ExportFormatType.Xml
End Select
.ExportToDisk(l_ExportFormatType, l_strReportOutputPath & "\" & l_strOutputFile)
It crashes on the last line .ExportToDisk ...

Answer 1

I solved this problem, It was the hint from heringer that gave me the clue. I am passing 6 parameters to the main report but two of them are only used by the a sub-report not the main reports itself. I was defining these without the leading "#". I figured this out by display the parameters as I passed them in my code.
I was also able to look at an old report that was working and saw that I needed the at signs.
Bob