diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 951b287c..543b3872 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1037,6 +1037,8 @@ def fetchcp_new(rower,workouts):
     if len(data)>1:
         df = pd.concat(data,axis=0)
 
+    print(df)
+
     df = df = df[df['cp'] == df.groupby(['delta'])['cp'].transform('max')]
 
 
@@ -1076,7 +1078,7 @@ def setcp(workout,background=False):
                 df.to_parquet(filename,engine='fastparquet',compression='GZIP')
                 return df,delta,cpvalues
 
-    return pd.DataFrame(),pd.Series(),pd.Series()
+    return pd.DataFrame({'delta':[],'cp':[]}),pd.Series(),pd.Series()
 
 
 def fetchcp(rower,theworkouts,table='cpdata'):