Problem in WPF with opening report ArgumentOutOfRange . Happens sometimes.

Question

Hello,
I started using Crystal Reports in my new WPF .NET 4.0 project.
My datasource is a generic List.
Via the database expert I was able to select my object type (class in my project).
This is my code in the constructor of a WPF window to load the data and 2 parameters:
     var report = new ReportDocument();
            var reportPath = Path.Combine(Settings.Default.ReportLokatie, "ChauffeurExtraBeschikbaar.rpt");          
            report.Load(reportPath);
            try
                //Get the collection of parameters from the report
                var crParameterFieldDefinitions = report.DataDefinition.ParameterFields;
                //Access the specified parameter from the collection
                var naamParameter = crParameterFieldDefinitions["VolledigeNaam"];
                var tikParameter = crParameterFieldDefinitions["Tiknummer"];
                //Get the current values from the parameter field.  At this point
                //there are zero values set.
                var naamParameterValues = naamParameter.CurrentValues;
                var tiknummerParameterValues = tikParameter.CurrentValues;
                naamParameterValues.Clear();
                tiknummerParameterValues.Clear();
                //Set the current values for the parameter field
                var naamValue = new ParameterDiscreteValue();
                naamValue.Value = volledigeNaam;
                var tiknummerValue = new ParameterDiscreteValue();
                tiknummerValue.Value = tiknummer;
                //Add the first current value for the parameter field
                naamParameterValues.Add(naamValue);
                tiknummerParameterValues.Add(tiknummerValue);
                //All current parameter values must be applied for the parameter field.
                naamParameter.ApplyCurrentValues(naamParameterValues);
                tikParameter.ApplyCurrentValues(tiknummerParameterValues);
            catch (Exception)
                MessageBox.Show("Error parameters");
            crystalReportsViewer1.ViewerCore.ReportSource = report;
            report.SetDataSource(lijst);
Sometimes when I call the window I got:  System.ArgumentOutOfRangeException: Specified index is out of range or child at index is null. Do not call this method if VisualChildrenCount returns Zero; indicating that the Visual has no children.
Parameter name: index
Actual value was 0.
at System.WIndows.FrameworkElement.GetVisualChild(Int32 index)
at SAPBusinessObjects.WPF.Viewer.ReportAlbum.ShowTabHeader(Boolean isShow)
Thanks in advance.
Regards,
Wesley

Answer 1

Hi Wesley
1) Make sure you are on SP1:
SAP Crystal Reports, developer version for Microsoft Visual Studio: Updates & Runtime Downloads [original link is broken]
2) Have a look at KB [1566187|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333533363336333133383337%7D.do]
3) As an FYI, also see KB [1544675|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333533343334333633373335%7D.do]
- Ludek