diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index e83e1365..f4a20ba2 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1195,6 +1195,7 @@ def parsenonpainsled(fileformat,f2,summary):
         hasrecognized = True
     except KeyError:
         hasrecognized = False
+        return None, hasrecognized, '', 'unknown'
 
 
     # handle speed coach GPS 2