为什么Error1004：无法设置Range类的NumberFormat属性？

为什么我得到Error1004：无法设置Range类的NumberFormat属性？

Sub ReadFile(fileName As String) Dim projectWb As Workbook Dim lastRow As Long Dim lastRowOutput As Long Dim row As Long Application.ScreenUpdating = False Set projectWb = Workbooks.Open(Range("folderPath") & fileName, False) lastRow = projectWb.Sheets("Beställningar").Cells.Find("*", [A1], xlValues, , xlByRows, xlPrevious).row For row = 64 To lastRow lastRowOutput = ThisWorkbook.Sheets("Output").Cells.Find("*", [A1], xlValues, , xlByRows, xlPrevious).row 'The folloing line works ThisWorkbook.Sheets("Output").Range("F" & lastRowOutput + 1 & ":" & "M" & lastRowOutput + 1).Value = projectWb.Sheets("Beställningar").Range("B" & row & ":" & "I" & row).Value 'Beställning 'The following line generates Error1004: unable to set the NumberFormat property of the Range class? ThisWorkbook.Sheets("Output").Range("F" & lastRowOutput + 1 & ":" & "M" & lastRowOutput + 1).NumberFormat = projectWb.Sheets("Beställningar").Range("B" & row & ":" & "I" & row).NumberFormat 'Beställning Next row 'close without saving Application.DisplayAlerts = False projectWb.Close (False) Application.DisplayAlerts = True Application.ScreenUpdating = True End Sub