diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index 7e6ab4ec..1264b7af 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -5909,10 +5909,13 @@ def interactive_flex_chart2(id, r, promember=0,
 
     x1 = rowdata['x1']
     y1 = rowdata['y1']
-    popt, pcov = optimize.curve_fit(func, x1, y1)
-    ytrend = func(x1, popt[0], popt[1])
-    rowdata['ytrend'] = ytrend
-
+    try:
+        popt, pcov = optimize.curve_fit(func, x1, y1)
+        ytrend = func(x1, popt[0], popt[1])
+        rowdata['ytrend'] = ytrend
+    except TypeError:
+        rowdata['ytrend'] = y1
+        
     # prepare data
     source = ColumnDataSource(
         rowdata
diff --git a/rowers/tasks.py b/rowers/tasks.py
index 28491f0b..f54550d6 100644
--- a/rowers/tasks.py
+++ b/rowers/tasks.py
@@ -426,7 +426,7 @@ def handle_workout_tp_upload(w, thetoken, tcxfilename, debug=False, **kwargs):
         w.tpid = -1
         try:
             os.remove(tcxfilename)
-        except WindowsError:
+        except:
             pass
         
         w.save()
@@ -748,32 +748,47 @@ def handle_strava_sync(stravatoken,
                 try:
                     res = act.wait(poll_interval=1.0, timeout=30)
                 except stravalib.exc.ActivityUploadFailed:  # pragma: no cover
-                    dologging('strava_fail.log', 'Strava upload failed for Workout {id} ActivityUploadFailed'.format(
-                        id=workoutid))
+                    dologging(
+                        'strava_fail.log',
+                        'Strava upload failed for Workout {id} ActivityUploadFailed'.format(
+                            id=workoutid)
+                    )
                     tb = traceback.format_exc()
                     dologging('strava_fail.log', tb)
                     failed = True
                 except stravalib.exc.TimeoutExceeded: # pragma: no cover
-                    dologging('strava_fail.log', 'Strava upload failed for Workout {id} TimeOutExceeded'.format(
-                        id=workoutid))
+                    dologging(
+                        'strava_fail.log',
+                        'Strava upload failed for Workout {id} TimeOutExceeded'.format(
+                            id=workoutid)
+                    )
                     tb = traceback.format_exc()
                     dologging('strava_fail.log', tb)
                     failed = True
                 except JSONDecodeError:  # pragma: no cover
-                    dologging('strava_fail.log', 'Strava upload failed for Workout {id} JSONDecodeError'.format(
-                        id=workoutid))
+                    dologging(
+                        'strava_fail.log',
+                        'Strava upload failed for Workout {id} JSONDecodeError'.format(
+                            id=workoutid)
+                    )
                     tb = traceback.format_exc()
                     dologging('strava_fail.log', tb)
                     failed = True
                 except stravalib.exc.ObjectNotFound:  # pragma: no cover
-                    dologging('strava_fail.log', 'Strava upload failed for Workout {id} ObjectNotFound'.format(
-                        id=workoutid))
+                    dologging(
+                        'strava_fail.log',
+                        'Strava upload failed for Workout {id} ObjectNotFound'.format(
+                            id=workoutid)
+                    )
                     tb = traceback.format_exc()
                     dologging('strava_fail.log', tb)
                     failed = True
                 except IndexError:  # pragma: no cover
-                    dologging('strava_fail.log', 'Strava upload failed for Workout {id} IndexError'.format(
-                        id=workoutid))
+                    dologging(
+                        'strava_fail.log',
+                        'Strava upload failed for Workout {id} IndexError'.format(
+                            id=workoutid)
+                    )
                     tb = traceback.format_exc()
                     dologging('strava_fail.log', tb)
                     failed = True
@@ -3846,10 +3861,13 @@ def fetch_strava_workout(stravatoken, oauth_data, stravaid, csvfilename, userid,
     if velo is None:  # pragma: no cover
         velo = np.zeros(nr_rows)
 
-    dt = np.diff(t).mean()
-    wsize = round(5./dt)
+    try:
+        dt = np.diff(t).mean()
+        wsize = round(5./dt)
 
-    velo2 = ewmovingaverage(velo, wsize)
+        velo2 = ewmovingaverage(velo, wsize)
+    except ValueError:
+        velo2 = velo
 
     if coords is not None:
         try:
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
index a4ae0ddb..169642f1 100644
Binary files a/rowers/tests/testdata/testdata.tcx.gz and b/rowers/tests/testdata/testdata.tcx.gz differ