From 36dc32397d1f1b56a37934593983c4bd72de9522 Mon Sep 17 00:00:00 2001
From: Stefano Borini <sborini@enthought.com>
Date: Wed, 16 Aug 2017 17:33:18 +0100
Subject: [PATCH] Fixed MCOStartEvent content

---
 force_bdss/core_driver_events.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/force_bdss/core_driver_events.py b/force_bdss/core_driver_events.py
index b656bde..2116c2a 100644
--- a/force_bdss/core_driver_events.py
+++ b/force_bdss/core_driver_events.py
@@ -7,8 +7,8 @@ class BaseDriverEvent(HasStrictTraits):
 
 class MCOStartEvent(BaseDriverEvent):
     """MCO should emit this event when the evaluation starts."""
-    input_names = Str()
-    output_names = Str()
+    input_names = Tuple(Str())
+    output_names = Tuple(Str())
 
 
 class MCOFinishEvent(BaseDriverEvent):
-- 
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