Index: hyperestraier/rubynative/estcmd.rb
===================================================================
--- hyperestraier.orig/rubynative/estcmd.rb	2010-08-06 19:37:35.857451876 +0900
+++ hyperestraier/rubynative/estcmd.rb	2010-08-06 19:39:00.825451999 +0900
@@ -687,7 +687,7 @@
 
 
 # perform the main routine
-$0.gsub!(/.*\//, "")
+$0 = $0.gsub(/.*\//, "")
 exit(main(ARGV))
 
 
