Sorry but I tried this macro in another module and it still doesn't compile.
I think something that was saved before got changed due to a file that wasn't
recovered properly. So can someone find out what little bitty thing is
missing? I know it works. I remember I had to change one thing to get it to
work and I don't know if that is the old version now.

thanks,
Sub ckForDupes()

Dim Rng As Range
Dim cell As Range
Dim i As Long, c1 As Long
Dim v

Set Rng = Range("B1", Range("B65536").End(xlUp))


For Each cell In Rng
v = MACSplit(cell.Text, ",")
For i = LBound(v) To UBound(v)
c1 = Application.CountIf(Rng, "*" & v(i) & "*")
If c1 1 Then ' it should be 1 to match itself
MsgBox v(i) & " :possible dups"
cell.Interior.ColorIndex = 3

End If
Next
Next

End Sub

Function MACSplit(s As String, s3 As String)
Dim v As Variant, sChr As String
Dim S1 As String, s2 As String
Dim cnt As Long
Dim i
ReDim v(0 To 0)
S1 = Trim(s)
s2 = ""
If InStr(1, S1, s3, vbTextCompare) = 0 Then
v(0) = S1
MACSplit = v
Exit Function
End If
cnt = -1
For i = 1 To Len(S1)
sChr = Mid(S1, i, 1)
If sChr = s3 Then
cnt = cnt + 1
ReDim Preserve v(0 To cnt)
v(UBound(v)) = s2
s2 = ""
Else
s2 = s2 & sChr
End If
Next
If s2 < "" And s2 < s3 Then
cnt = cnt + 1
ReDim Preserve v(0 To cnt)
v(UBound(v)) = s2
End If
MACSplit = v
End Function