GridGroupingControl doesn''t show Relation at design-time

Hi, i have set up a GCC in the designer. I set the Columns and they get displayed just fine. Now i added a relation in the designer. This Relation appears now under the "TableDescriptors" Section of the properties pane. When i set up the columns in this Table nothing changes in the view. I only see the parenttable and nothing of the subtable. I guess i would have to set up a Relationkey to have that subtable displayed in the designer, right ? I tried to do so but the Relationkey gets deleted everytime i leave the design-view. Any help on this ?

For now, you will have to re-add that relationkey at runtime. I think this is a something we will have to research, and possibly correct in our source code. I will forward it onto the grid architect for his feedback on this.