diff -r a51ae096ca25 util/checkpoint_aggregator.py
--- a/util/checkpoint_aggregator.py	Wed Aug 24 14:20:53 2016 +0100
+++ b/util/checkpoint_aggregator.py	Tue Sep 20 16:07:18 2016 +0900
@@ -135,6 +135,7 @@
 
     merged_config.add_section("Globals")
     merged_config.set("Globals", "curTick", max_curtick)
+    merged_config.set("Globals", "numMainEventQueues", 1)
 
     merged_config.write(agg_config_file)