Index: tl_nds_common.py
===================================================================
--- tl_nds_common.py    (revision 22567)
+++ tl_nds_common.py    (working copy)
@@ -527,7 +527,7 @@
             self.vprint("Using initial_number (%d)" % number)
 
         for i in range(self.numbertries):
-            self.vprint("Searching for free number using filter %s" % self.numbersearch_filter % number)
+            self.vprint("Searching for free number using filter %s" % self.numbersearch_filter % (number+i))
             # Check if number is used in local NSS database.
             try:
                 self.numbercheck(number+i)