Cannot Find Source of Error 9

[CdyMan]

Working in an "invoice" workbook, all I'm trying to do is get 5 pieces of information from another open workbook (SHMaster), InvNo from sheet Inv Data and Bill to data from sheet Cust Data. Cannot get past the error 9 and there is no line highlighted. I've checked and rechecked the file name and path. Can anyone see something I don't? Thanks all.

Dim wks1 As Worksheet
Dim wks2 As Worksheet
Dim awf As Object
Dim name As String
If Range("InvNo") = "" Then
    Set wks1 = Workbooks("c:\SH\SHMaster.xlxm").Sheets("Cust Data")
    Set wks2 = Workbooks("c:\SH\SHMaster.xlxm").Sheets("Inv Data")   '
    Set awf = Application.WorksheetFunction
        
    Range("InvNo") = wks2.Cells(Rows.Count, 1).End(xlUp).Offset(0, 1).Value
    name = wks1.Cells(Rows.Count, 1).End(xlUp).Offset(0, 0).Value
    Range("InvBillName") = awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 1)
    Range("InvBillAdr1") = awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 2)
    Range("InvBillAdr2") = awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 3)
    Range("InvBillCSZ") = awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 4) & " " & _
        awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 5) & "  " & _
        awf.Index(wks1.Range("arrCustData"), awf.Match(name, wks1.Range("lstCustName"), False), 6)
End If
End Sub