Index: trunk/ippScripts/scripts/phase2.pl
===================================================================
--- trunk/ippScripts/scripts/phase2.pl	(revision 11829)
+++ trunk/ippScripts/scripts/phase2.pl	(revision 11830)
@@ -137,5 +137,9 @@
     $command .= " -bg " . $stats->bg_mean();
     $command .= " -bg_stdev " . $stats->bg_stdev();
-    $command .= " -bg_mean_stdev " . $stats->bg_mean_stdev();
+    if ( defined $stats->bg_mean_stdev() ) {
+	$command .= " -bg_mean_stdev " . $stats->bg_mean_stdev();
+    } else {
+	$command .= " -bg_mean_stdev 0.0";
+    }
     $command .= " -dbname $dbname" if defined $dbname;