Index: /trunk/Nebulous-Server/bin/neb-admin
===================================================================
--- /trunk/Nebulous-Server/bin/neb-admin	(revision 32512)
+++ /trunk/Nebulous-Server/bin/neb-admin	(revision 32513)
@@ -636,4 +636,9 @@
 	my $destination_host   = $destination{HOST}{$class_id};
 	my $destination_uri    = $uri;
+	unless ((defined($destination_uri))&&
+		(defined($source_name))&&
+		(defined($destination_name))) {
+	    next;
+	}
 	$destination_uri =~ s/$source_name/$destination_name/;