I Have a grid which uses the Band summary and formula to sum one of the columns say column A. When I export the grid to Excel, using the GridExcelExporter everything displays correctly in Excel including the column summary but when in Excel I increase the value of column A in one of the rows by 1 the summary does not increase. My question is: should the underlying formula be exported by the GridExcelExporter or is it just a static calculation of the values of the column at the time of export ? If it is the former how do i make it work I am using version 8.1.20081.1000 of the GridExcelExporter Thanks John