diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 5c575b51..ceb22158 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1211,8 +1211,12 @@ def setcp(workout,background=False,recurrance=True):
     filename = 'media/cpdata_{id}.parquet.gz'.format(id=workout.id)
 
     strokesdf = getsmallrowdata_db(['power','workoutid','time'],ids = [workout.id])
-    if strokesdf['power'].std()==0:
+    try:
+        if strokesdf['power'].std()==0:
+            return pd.DataFrame(),pd.Series(),pd.Series()
+    except KeyError:
         return pd.DataFrame(),pd.Series(),pd.Series()
+    
     if background:
         job = myqueue(queuelow,handle_setcp,strokesdf,filename,workout.id)
         return pd.DataFrame({'delta':[],'cp':[]}),pd.Series(),pd.Series()