Index: trunk/ippScripts/scripts/detrend_stack.pl
===================================================================
--- trunk/ippScripts/scripts/detrend_stack.pl	(revision 11316)
+++ trunk/ippScripts/scripts/detrend_stack.pl	(revision 11319)
@@ -82,5 +82,5 @@
 	run(command => $command, verbose => 1);
     unless ($success) {
-	$error_code >> 8;
+	$error_code = $error_code >> 8;
 	&my_die("Unable to perform dettool -processedimfile: $error_code", $det_id, $iter, $class_id, $error_code);
     }
@@ -117,5 +117,5 @@
 	run(command => $command, verbose => 1);
     unless ($success) {
-	$error_code >> 8;
+	$error_code = $error_code >> 8;
 	&my_die("Unable to perform ppMerge: $error_code", $det_id, $iter, $class_id, $error_code);
     }
@@ -157,5 +157,5 @@
 	run(command => $command, verbose => 1);
     unless ($success) {
-	$error_code >> 8;
+	$error_code = $error_code >> 8;
 	warn("Unable to perform dettool -addstacked: $error_code\n");
 	exit($error_code);