diff --git a/boxmox/experiment.py b/boxmox/experiment.py
index 0f8a89e0ebbd543e427f6dd3cd874d8862881b7c..7af26361f82f45c1adb9fe1395a733a870c9f57a 100644
--- a/boxmox/experiment.py
+++ b/boxmox/experiment.py
@@ -33,7 +33,7 @@ class ExampleData:
         self.path = path
         self.files = { x.replace(".csv", ""): os.path.join(self.path, x) for x in os.listdir(self.path) if '.csv' in x }
 
-examples = { x: ExampleData(os.path.join(examplesPath, x)) for x in os.listdir(examplesPath) }
+examples = { x: ExampleData(os.path.join(examplesPath, x)) for x in os.listdir(examplesPath) if os.path.isdir( os.path.join(examplesPath, x))}
 
 class Namelist:
     '''