Index: trunk/ippScripts/scripts/detrend_resid.pl
===================================================================
--- trunk/ippScripts/scripts/detrend_resid.pl	(revision 9457)
+++ trunk/ippScripts/scripts/detrend_resid.pl	(revision 9491)
@@ -146,5 +146,9 @@
 }
 
-END { system("sync") == 0 or die "failed to execute sync: $!" }
+END {
+    my $exit = $?;
+    system("sync") == 0 or die "failed to execute sync: $!";
+    $? = $exit;
+}
 
 __END__