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Ayo

Subscript out of range error message

Why am I getting this error message?

Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Address() = "$B$3" Then
With Charts("Milestone Chart")
.HasTitle = True
.ChartTitle.Text = Range("B3") & " " & Range("B4") & " - NLP2"
End With

End If

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