Index: trunk/ippScripts/scripts/warp_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/warp_skycell.pl	(revision 16308)
+++ trunk/ippScripts/scripts/warp_skycell.pl	(revision 16563)
@@ -247,5 +247,5 @@
 
     warn($msg);
-    if ($warp_id and $skycell_id and $tess_id and not $no_update) {
+    if (defined $warp_id and defined $skycell_id and defined $tess_id and not $no_update) {
 	my $command = "$warptool -addwarped -warp_id $warp_id -skycell_id $skycell_id -tess_id $tess_id -code $exit_code";
 	$command .= " -dbname $dbname" if defined $dbname;