Change chart object with crosstab base not work

Question

Hi
I use this simple script to change some settings on the chart. Is a chart base on a crosstab, an error occurs: " The chart data fields are not valid.". All other chart not base on a crosstab work fine. Why?
Example:
Public Sub test(ByVal strTempFile As String)
    Dim rpt As New CrystalDecisions.CrystalReports.Engine.ReportDocument
    Dim crROC As CrystalDecisions.ReportAppServer.Controllers.ReportObjectController
    Dim crAppChart As CrystalDecisions.ReportAppServer.ReportDefModel.ChartObject
    Dim crAppChartNew As CrystalDecisions.ReportAppServer.ReportDefModel.ChartObject
    rpt.Load(strTempFile, OpenReportMethod.OpenReportByTempCopy)
    crROC = rpt.ReportClientDocument.ReportDefController.ReportObjectController
    For Each crAppChart In crROC.GetReportObjectsByKind(CrystalDecisions.ReportAppServer.ReportDefModel.CrReportObjectKindEnum.crReportObjectKindChart)
        crAppChartNew = crAppChart.Clone()
        crAppChartNew.ChartStyle.TextOptions.DataLabelFont.Font.Name = "Arial"
        crROC.Modify(crAppChart, crAppChartNew) 'Error: The chart data fields are not valid.
    Next
End Sub

Answer 1

Well, let's stick with one issue. If you want to discuss other issues, create a new thread per each one ([Rules of Engagement|https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/rulesofEngagement]). Re. charts based on xtabs. Try to create the chart in the designer first. Then try to create it in code. Even in the designer, the chart must be quite basic. E.g.; no multiple summaries. Also, can you create a chart in your code on a report that has no xtab?
Ludek