diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 6110cf26..6efa68d0 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1557,7 +1557,11 @@ def getsmallrowdata_db(columns, ids=[], doclean=True, workstrokesonly=True):
     if extracols and len(ids)==1:
         w = Workout.objects.get(id=ids[0])
         row = rdata(w.csvfilename)
-        f = row.df['TimeStamp (sec)'].diff().mean()
+        try:
+            f = row.df['TimeStamp (sec)'].diff().mean()
+        except AttributeError:
+            f = 0
+            
         if f != 0 and not np.isnan(f):
             windowsize = 2 * (int(10. / (f))) + 1
         else: