diff --git a/app/DD_PM_WINDREAM/ClassDragDrop.vb b/app/DD_PM_WINDREAM/ClassDragDrop.vb
index fd48f38..b36b079 100644
--- a/app/DD_PM_WINDREAM/ClassDragDrop.vb
+++ b/app/DD_PM_WINDREAM/ClassDragDrop.vb
@@ -57,12 +57,14 @@ Public Class ClassDragDrop
                     Dim row As DataRow = view.GetDataRow(downHitInfo.RowHandle)
                     Dim source As String = view.GridControl.Name
 
-                    dragDropData = row.Item("GUID") & "|" & source
+                    If Not IsNothing(row) Then
+                        dragDropData = row.Item("GUID") & "|" & source
 
-                    view.GridControl.DoDragDrop(dragDropData, DragDropEffects.Move)
-                    downHitInfo = Nothing
+                        view.GridControl.DoDragDrop(dragDropData, DragDropEffects.Move)
+                        downHitInfo = Nothing
 
-                    DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = True
+                        DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = True
+                    End If
                 End If
             End If
         Catch ex As Exception