Index: trunk/ippScripts/scripts/magic_tree.pl
===================================================================
--- trunk/ippScripts/scripts/magic_tree.pl	(revision 16331)
+++ trunk/ippScripts/scripts/magic_tree.pl	(revision 16563)
@@ -234,5 +234,5 @@
 
     carp($msg);
-    if ($magic_id and not $no_update) {
+    if (defined $magic_id and not $no_update) {
 	my $command = "$magictool -inputtree";
 	$command .= " -magic_id $magic_id";