Index: trunk/ippScripts/scripts/detrend_stack.pl
===================================================================
--- trunk/ippScripts/scripts/detrend_stack.pl	(revision 11829)
+++ trunk/ippScripts/scripts/detrend_stack.pl	(revision 11830)
@@ -155,11 +155,11 @@
 	" -uri $outputStack -recip $recipe"; # Command to run
     $command .= ' -bg ' . $stats->bg_mean();
-    if (defined($stats->bg_stdev())) {
-    $command .= ' -bg_stdev ' . $stats->bg_stdev();
+    if (defined($stats->bg_mean_stdev())) {
+    $command .= ' -bg_mean_stdev ' . $stats->bg_mean_stdev();
     } else {
 	# May be undefined if there is only a single imfile
-	$command .= ' -bg_stdev 0';
-    }
-    $command .= ' -bg_mean_stdev ' . $stats->bg_mean_stdev();
+	$command .= ' -bg_mean_stdev 0';
+    }
+    $command .= ' -bg_stdev ' . $stats->bg_stdev();
     $command .= " -dbname $dbname" if defined $dbname;
     my ( $success, $error_code, $full_buf, $stdout_buf, $stderr_buf ) =