用于插入行和填充的宏失败

我不知道为什么在ActiveSheet.Rows(r).Insert出现错误时失败1004.Range类的Insert方法失败。

你能帮我吗?

Sub SetKPIDuration()

Dim Duration As Integer, i As Integer, r As Integer

Duration = InputBox("Enter number of week for KPI to run (min 18)", 
"Duration of KPI", 18)

Select Case True
    Case Duration < 10
        Duration = 18
        GoTo IncreaseKPI
    Case Duration < Application.WorksheetFunction.Max(Range("A7:A150"))
        GoTo ReduceKPI
    Case Else
        GoTo IncreaseKPI
End Select

ReduceKPI:

Rows((Duration + 7) & ":150").Clear
Exit Sub

IncreaseKPI:
Application.ScreenUpdating = False
i = Application.WorksheetFunction.Max(Range("A7:A150"))
r = i + 7

While i < Duration

    ActiveSheet.Rows(r).insert

Wend

Range("A" & (r - 1) & ":" & "M" & (r + i)).filldown


Application.CutCopyMode = False


ScreenUpdating = True

End Sub