I got this error message when I try to count how many no-empty cells for a certain row, check several question from other people related to that, I think I already assign which tab I would like to count (DAU)
Option Explicit
Sub Adjust_col()
    Dim wb As Workbook
    Dim App_list As Long, DAU_col As Long
    Set wb = ThisWorkbook
    App_list = wb.Sheets("App Name Map").Range("B2").End(xlDown).Row
    DAU_col = wb.Sheets("DAU").Range("D4", Range("D4").End(xlToRight)).Count
    MsgBox DAU_col
End Sub
What it keep giving me the error for my Variable DAU_col, if I choose the active tab is DAU, it works well, otherwise it won't work.
 
    