以下程序错在哪里?
'选择该层所有对象
Public Sub s()
Dim sset As AcadSelectionSet
On Error Resume Next
Set sset = ThisDrawing.SelectionSets.Item("SS1")
sset.Delete
Set sset = ThisDrawing.SelectionSets.Add("SS1")
FilterType = 8
FilterData = "0"
sset.SelectOnScreen FilterType, FilterData
End Sub