diff --git a/longs/views.py b/longs/views.py
index 9419125e..d3aec6c8 100755
--- a/longs/views.py
+++ b/longs/views.py
@@ -933,6 +933,11 @@ def exam_scores_cid_user(request, pk, sk):
 @login_required
 def long_series_order_dicom(request, pk):
     series = get_object_or_404(LongSeries, pk=pk)
-    series.order_by_dicom_location()
+    try:
+        series.order_by_dicom_location()
+    except:
+        return Http404
+
+    return redirect("longs:long_series_detail", pk=pk)
 
 LongExamViews = ExamViews(Exam, Long, "longs", "long", loadJsonAnswer)
\ No newline at end of file