diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 5c9d0c33..7496d8dc 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -323,7 +323,14 @@ def resample(id, r, parent, overwrite='copy'):
     data['datetime'] = data['time'].apply(
         lambda x: startdatetime+datetime.timedelta(seconds=x/1000.))
 
-    data = data.resample('S', on='datetime').mean()
+    try:
+        data = data.resample('S', on='datetime').mean()
+    except TypeError:
+        data1 = data._get_numeric_data()
+        data1['datetime'] = data['datetime']
+        data = data1.resample('S', on='datetime').mean()
+            
+        
     data.interpolate(method='linear', inplace=True)
     data.reset_index(drop=True, inplace=True)
 
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
index 7f20535e..27485f46 100644
Binary files a/rowers/tests/testdata/testdata.tcx.gz and b/rowers/tests/testdata/testdata.tcx.gz differ