From 4f735beb98a722a5c0a6552f57b69a2d312905ba Mon Sep 17 00:00:00 2001
From: Sander Roosendaal <roosendaalsander@gmail.com>
Date: Mon, 26 Mar 2018 03:30:17 -0700
Subject: [PATCH] provision for empty data frame in new workout

---
 rowers/dataprep.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index cd983a7b..6885e341 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -853,6 +853,9 @@ def save_workout_database(f2, r, dosmooth=True, workouttype='rower',
                 powerperc=powerperc, powerzones=r.powerzones)
     row = rdata(f2, rower=rr)
 
+    if row.df.empty:
+        return (0, 'Error: CSV data file was empty')
+    
     dtavg = row.df['TimeStamp (sec)'].diff().mean()
 
     if dtavg < 1: