Unhandled exception window described above opens when the delRow.Delete(); is executed on the client.

                var grid = ISGetObject("DocumentGrid");
                if (grid != null)
                {
                    var delRow = grid.RootTable.GetRowByKeyValue(retVal);
                    if (delRow != null)
                    {
                        delRow.Delete();
                    }
                }           

Is there some link to data that I'm either not setting or setting incorrectly that the Webgrid control needs to communicate to the server. Or is this a Help issue and it's trying to contact Intersoft Help?