From 62abcd0b744d2c80ccc231fc61039e442fef70ce Mon Sep 17 00:00:00 2001
From: guerler <aysam.guerler@gmail.com>
Date: Tue, 5 May 2015 14:07:24 -0400
Subject: [PATCH] Create empty history if history is unavailable during api
 call

---
 lib/galaxy/tools/parameters/basic.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/galaxy/tools/parameters/basic.py b/lib/galaxy/tools/parameters/basic.py
index c689005ec22..19d89edd797 100644
--- a/lib/galaxy/tools/parameters/basic.py
+++ b/lib/galaxy/tools/parameters/basic.py
@@ -1657,6 +1657,8 @@ class BaseDataToolParameter( ToolParameter ):
         assert trans is not None, "%s requires a trans" % class_name
         if history is None:
             history = trans.get_history()
+        if history is None:
+            history = trans.get_history( create=True )
         assert history is not None, "%s requires a history" % class_name
         return history