diff --git a/lib/classes/set/export.class.php b/lib/classes/set/export.class.php
index 3b056189bc..30fb5efe61 100644
--- a/lib/classes/set/export.class.php
+++ b/lib/classes/set/export.class.php
@@ -1031,39 +1031,19 @@ class set_export extends set_abstract
   public static function stream_data($data, $exportname, $mime, $disposition='attachment')
   {
 
-          header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
-          header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
-          header("Cache-Control: no-store, no-cache, must-revalidate");
-          header("Cache-Control: post-check=0, pre-check=0", false);
-          header("Pragma: public");
-          header("Content-Type: " . $mime);
-          header("Content-Length: " . strlen($data));
-          header("Cache-Control: max-age=3600, must-revalidate ");
-          header("Content-Disposition: " . $disposition . "; filename=" . $exportname . ";");
-echo $data;
-          exit();
-    $response = new \Symfony\Component\HttpFoundation\Response();
-    $response->headers->set('Cache-Control', 'must-revalidate, post-check=0, pre-check=0');
-    $response->setLastModified(new DateTime());
-    $response->headers->set('Pragma', 'public', true);
-    $response->headers->set('Content-Type', $mime);
-    $response->headers->set('Content-Length', strlen($data));
-    $response->headers->set('Content-Disposition', $disposition. "; filename=" . $exportname . ";");
-//    header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
-//    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
-//        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
-//
-//        header("Pragma: public");
-//
-//    header("Content-Type: " . $mime);
-//    header("Content-Length: " . strlen($data));
-//    header("Cache-Control: max-age=3600, must-revalidate ");
-//    header("Content-Disposition: " . $disposition
-//            . "; filename=" . $exportname . ";");
-//
-//    echo $data;
-    $response->send();
-exit();
+    header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
+    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
+    header("Cache-Control: no-store, no-cache, must-revalidate");
+    header("Cache-Control: post-check=0, pre-check=0", false);
+    header("Pragma: no-cache");
+    header("Content-Type: " . $mime);
+    header("Content-Length: " . strlen($data));
+    header("Cache-Control: max-age=3600, must-revalidate ");
+    header("Content-Disposition: " . $disposition
+            . "; filename=" . $exportname . ";");
+
+    echo $data;
+
     return true;
   }