VBA-简单的事情发生运行时错误91？

Question

在对 ID 进行简单搜索时出现运行时错误 91...为什么？（已解决：搜索失败，因为单元格被格式化为带逗号的数字 - 很奇怪但却是事实，将格式更改为“常规”后，它就可以完美运行了！谢谢大家！）

Public Sub SearchID()
      Dim foundCell As Range
      Dim searchEmpID As String
      Dim searchRange As Range
      Dim rowFound As Integer

      searchEmpID = "EmpID_0112"
      Set searchRange = Sheets("HoursData").Range("DY2:DY999")
      Sheets("HoursData").Select
      Set foundCell = searchRange.Find(What:=searchEmpID, LookIn:=xlValues, LookAt:=xlWhole, SearchDirection:=xlNext, MatchCase:=False, SearchFormat:=False)

MsgBox Sheets("HoursData").Range("DY115").Value '<<<<< 数据/ID 在那里，请参见截图。

      rowFound = foundCell.Row      '<<<<<<<<<<<< Why this produces Runtime Error 91/Object Variable Not Set...???

End Sub