I wrote a script to create a yes/no drop-down list. However, in the few tries at first, it worked perfectly. However, later on, there's an error message "Run time error 1004: Select method of Range class failed"
Sub Drop_Down_List()
Worksheets("Sheet1").Range("M2:N2851").Select
With Selection.Validation
.Delete
.Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:=xlBetween, Formula1:="Yes,No"
.IgnoreBlank = True
.InCellDropdown = True
.InputTitle = ""
.ErrorTitle = ""
.InputMessage = ""
.ErrorMessage = ""
.ShowInput = True
.ShowError = True
End With
End Sub