Hi , we have a Ultragrid , that lists the documents that belong to a particular employee..That is for all rows the employeeid will have the same value . We have not used any dataset/datatable etc as the datasource of the grid. The datasource is a simple BindingListView<EmployeeObject> object ..While Populating the object we have not used any relations etc..i browsed in the web and found that this error is caused by some relation ship error where duplicate values exists etc etc..Can anyone suggest what's happening..Does the grid internally form some parent child relations etc...i am completely clueless