Looping Code Not Ending Correctly

I have the following code that I use to create individual client files from one master spreadsheet. My problem is that it always creates and saves a blank file with only the 'rn' value in the file name. It seems that it is looping one extra time when the 'rng.value' list ends.

Sub MakeFiles()
Dim wb As Workbook
Dim ws As Worksheet
Dim criteriaRng As Range, usedRng As Range, rng As Range
Dim lh As String, ch As String, rh As String
Dim rn As String

[code]....