3709 The search key wsa not found in any record

I have a bit of real simple VBA that is raising an error that I can't figure out.  The purpose of the procedure is simply to import (via saved imports that append to existing tables) dependant upon the first six letter of the file name.  The folder containing the files is passed in as an argument to the procedure which is called from another procedure that saves the files from email attachments.  Here is the Sub that raises the error:

Public Sub ImportTextFiles(strFolder As String)

    Dim strFile As String
    Dim strShort As String
   
    strFile = Dir(strFolder)
   
    strShort = Left(strFile, 6)
   
    While strFile <> ""
         
         Select Case strShort
            Case "ChildO"
                DoCmd.RunSavedImportExport "Import-ChildOrders"
            Case "Contin"
                DoCmd.RunSavedImportExport "Import-ContinuityEnrollment"
            Case "OrderI"
                DoCmd.RunSavedImportExport "Import-OrderItems"
            Case "Orders"
                DoCmd.RunSavedImportExport "Import-Orders"
            Case "Return"
                DoCmd.RunSavedImportExport "Import-ReturnsCancels"
            Case "Shippi"
            DoCmd.RunSavedImportExport "Import-Shipping"
        End Select
       
        Kill strFolder & strFile
               
       Debug.Print "Killed " & strFile
     Wend

End Sub

The error is: Run-time error '3709': The search key was not found in any record.

When the error occurs the first line containing the RunSavedImportExport command is highlighted.  

I am running Windows 7 with Access 2010 and this is a .accdb file of only 11.7Mb

I have tried C & R

The names of the only files in the folder are:

Shipping_20110919a.txt
ReturnsCancels_20110919a.txt
OrderItems_20110919a.txt
ContinuityEnrollment_20110919a.txt
ChildOrders_20110919a.txt
Orders_20110919a.txt