does fitscore

rowers/dataprep.py

@@ -1078,9 +1078,16 @@ def fitscore(rower,workout):
     wcpowers = fitfunc(p1wc,times)
     scores = 100.*powers/wcpowers
 
-    indexmax = scores.idxmax()
+    try:
+        indexmax = scores.idxmax()
+        delta = df.loc[indexmax,'delta']
+        maxvalue = scores.max()
+    except ValueError:
+        indexmax = 0
+        delta = 0
+        maxvalue = 0
 
-    return scores.max(),df.loc[indexmax,'delta']
+    return maxvalue,delta
 
 def fetchcp_new(rower,workouts):