Please check it--
Your data/time field is not getting split into date and time. No backfil will happen. Are you using latest Backfill.xlsm?
Find this part of code--
If MsgBox("Do you want to split Date_Time into separate columns", vbYesNo) = vbYes Then
Application.DisplayAlerts = False
Columns("C:C").Select
Selection.Insert Shift:=xlToRight, CopyOrigin:=xlFormatFromLeftOrAbove
Columns("B:B").Select
Range("B1").Activate
Selection.Copy
Columns("C:C").Select
Range("C1").Activate
ActiveSheet.Paste
Columns("B:B").Select
Range("B1").Activate
Application.CutCopyMode = False
Selection.NumberFormat = "d/m/yyyy"
Columns("C:C").Select
Range("C1").Activate
Selection.NumberFormat = "HH:MM:SS:" ' "[$-F400]h:mm:ss AM/PM"
End If
Check the bold lines are there. If not insert them or download latest NOWbackfil