Autofilter with more than 3 criteria

Question

I am using the following code to autofilter a column using more than 3 criteria - however, it is saying the "Autofilter method of range class failed"

This code looked to be working on another SO post.

Can anyone assist?

Thanks

Public Sub autofilter2()
Dim ws As Worksheet
Dim wsOut As Worksheet
Dim a As String

Dim b As String
Dim c As String

Set ws = Worksheets("Raw Data")
'AutoFilterMode = False
a = Cells(69, 6).Value
b = Cells(69, 7).Value
c = Cells(69, 8).Value


ws.Range("A:bk").autofilter field:=64, _
Criteria1:=Array(a, b, c), _
Operator:=xlFilterValues



End Sub

Answer 1

64 is beyond column BK. The max you can have is 63