Data Relation problem

Hi,

I am trying to design a report similar to Master-Details in demo.

Basicly, the data is the same, I need Articles from my database, filled by their Groups.

I am getting datasources that contains something like this:

[Articles]
ArticleName
ArticleGroupID
ArticlePrice
ArticleImage
...

[ArticleGroup]
ArticleGroupID
ArticleGroupName
ArticleGroupImage
...

---

I have a regular relation between my tables in database, it is Article table and ArticleGroup table.
They are related via ArticleGroupID column.

I am trying to add a relation between two tables to get the same report as Master-Details report in Demo.exe.

I tried to add a new relation, set "Parent table" and "Child table", set their columns according to their relationships in database, looking at Master-Details report, I think I didn't do anything wrong there. The relations between those two tables are crystal clear.

And then when I try to preview report , I am getting following error:

[b]Your report has thrown a following exception:[/b]

This row has been removed from a table and does not have any data.
BeginEdit() will allow creation of new data in this row.

Stack trace:
 at System.Data.DataRow.GetDefaultRecord()
   at System.Data.DataRow.get_Item(Int32 columnIndex)
   at FastReport.Data.TableDataSource.GetValue(Column column)
   at FastReport.Data.DataSourceBase.get_Item(Column column)
   at FastReport.Report.Calc(String expression, Variant value)
   at FastReport.Report.Calc(String expression)
   at FastReport.TextObject.GetData()
   at FastReport.BandBase.GetData()
   at FastReport.Engine.ReportEngine.nUAUh7KfP(BandBase , Boolean )
   at FastReport.Engine.ReportEngine.Pua5g4LOd(BandBase , Boolean )
   at FastReport.Engine.ReportEngine.EhE9bmNDn(BandBase , Boolean )
   at FastReport.Engine.ReportEngine.4xRqQa7ks(DataBand , Int32 )
   at FastReport.Engine.ReportEngine.GeqGFYmjx(DataBand , Int32 , Boolean , Boolean , Boolean )
   at FastReport.Engine.ReportEngine.EI7kaTMvt(DataBand )
   at FastReport.Engine.ReportEngine.nvCXVYAVOa(BandCollection )
   at FastReport.Engine.ReportEngine.GeqGFYmjx(DataBand , Int32 , Boolean , Boolean , Boolean )
   at FastReport.Engine.ReportEngine.EI7kaTMvt(DataBand )
   at FastReport.Engine.ReportEngine.nvCXVYAVOa(BandCollection )
   at FastReport.Engine.ReportEngine.aMVXoVk6sq(ReportPage )
   at FastReport.Engine.ReportEngine.wZgXD3iRKr()
   at FastReport.Engine.ReportEngine.Xis8OMHRH(Boolean , Boolean , ReportPage )
   at FastReport.Report.Prepare(Boolean append)
   at FastReport.Report.Prepare()
   at TmYf7SI0diqg0eIvpst.caoJ2yIYb9x6FsFXB9T.Q9WHjE7TZ()

I didn't manage to get a regular report. [img]style_emoticons/<#EMO_DIR#>/sad.gif" style="vertical-align:middle" emoid=":(" border="0" alt="sad.gif" /> What am I missing? Do you have any idea what caused this error? Thanks in advance, Bosko.[/img]