From 97554bd3aa74a03e2b99177ad3e7a303308b0b80 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <>
Date: Sat, 20 Oct 2012 07:11:56 +0000
Subject: [PATCH] rename bugfix, when arguments missing "Undefined... message"

git-svn-id: https://svn.fhem.de/fhem/trunk@1996 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/fhem.pl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 800b4b501..feb2b834e 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -1537,6 +1537,8 @@ CommandRename($$)
   my ($cl, $param) = @_;
   my ($old, $new) = split(" ", $param);
 
+  $old = "''" if(!defined($old));
+
   return "Please define $old first" if(!defined($defs{$old}));
   return "Invalid characters in name (not A-Za-z0-9.:_): $new"
                         if($new !~ m/^[a-z0-9.:_]*$/i);