diff --git a/orangecontrib/storynavigation/widgets/OWSNActionAnalysis.py b/orangecontrib/storynavigation/widgets/OWSNActionAnalysis.py
index 0bcbbda..4c61153 100644
--- a/orangecontrib/storynavigation/widgets/OWSNActionAnalysis.py
+++ b/orangecontrib/storynavigation/widgets/OWSNActionAnalysis.py
@@ -499,6 +499,7 @@ def set_stories(self, stories=None):
         """Stories expects a Corpus. Because Corpus is a subclass of Table, Orange type checking 
         misses wrongly connected inputs.         
         """
+        self.valid_stories = []
         if stories is not None:
             if not isinstance(stories, Corpus):
                 self.Error.wrong_input_for_stories()
@@ -525,6 +526,8 @@ def set_story_elements(self, story_elements=None):
         """Story elements expects a table. Because Corpus is a subclass of Table, Orange type checking 
         misses wrongly connected inputs."""
 
+        self.valid_stories = []
+        
         if story_elements is not None:
             if isinstance(story_elements, Corpus): 
                 self.Error.wrong_input_for_elements()
diff --git a/orangecontrib/storynavigation/widgets/OWSNActorAnalysis.py b/orangecontrib/storynavigation/widgets/OWSNActorAnalysis.py
index b21c36f..1fc4af9 100644
--- a/orangecontrib/storynavigation/widgets/OWSNActorAnalysis.py
+++ b/orangecontrib/storynavigation/widgets/OWSNActorAnalysis.py
@@ -568,6 +568,7 @@ def set_stories(self, stories=None):
         """Stories expects a Corpus. Because Corpus is a subclass of Table, Orange type checking 
         misses wrongly connected inputs.         
         """
+        self.valid_stories = []
         if (stories is not None):
             if not isinstance(stories, Corpus):
                 self.Error.wrong_input_for_stories()
@@ -594,6 +595,8 @@ def set_story_elements(self, story_elements=None):
         """Story elements expects a table. Because Corpus is a subclass of Table, Orange type checking 
         misses wrongly connected inputs."""
 
+        self.valid_stories = []
+        
         if story_elements is not None:
             if isinstance(story_elements, Corpus): 
                 self.Error.wrong_input_for_elements()