Autofilter: Determine When No Data Visible

WHEN I FILTER FOR WORDS BEGGINING WITH LETTER I. THERE IS NO DATA...SO I HAVE SOME CODE THAT WILL POP UP MSG BOX. AND IF THERE IS THEN COPY DESIGANTED RANGE..HOWEVEER WHEN I FILTER USING THE BELOW CODE...IT DOES NOT RECOGNIZE THAT THERE IS NOTHING AND JUST GOES THROUGH AS NORMAL..

Sub START()
Dim rng As Range
Dim rng2 As Range
Dim worksheet1 As Worksheet
Set worksheet1 = worksheets("MAIN")
Selection.AutoFilter Field:=4, Criteria1:="=I*", Operator:=xlAnd
With ActiveSheet.AutoFilter.Range
On Error Resume Next
Set rng2 = .Offset(0, 18).Resize(.Rows.Count - 1, 1)
.SpecialCells (xlCellTypeVisible)
On Error Goto 0
End With
If rng2 Is Nothing Then
MsgBox "No data to copy"
Else
worksheets("noms").Cells.Clear
Set rng = ActiveSheet.AutoFilter.Range
rng.Offset(1, 0).Resize(rng.Rows.Count - 1).Copy _
destination:=worksheets("NOMS").Range("A1")
End Sub