--- a/web/app/models/benchmark_configuration.rb	Wed Jun 26 10:04:57 2013 +0200
+++ b/web/app/models/benchmark_configuration.rb	Wed Jun 26 10:14:41 2013 +0200
@@ -35,8 +35,12 @@
 
   def results_at(time)
     batch = benchmark_batches.where(performed_at: time).first
-    all_benchmark_infos.map do |info|
-      batch.result_for(info)
+    if batch
+      all_benchmark_infos.map do |info|
+        batch.result_for(info)
+      end
+    else
+      []
     end
   end