better power zones

rowers/interactiveplots.py

@@ -6283,7 +6283,15 @@ def thumbnails_set(r, id, favorites):
     columns += ['time']
     rowdata = dataprep.getsmallrowdata_db(columns, ids=[id], doclean=True)
 
-    rowdata.dropna(axis=1, how='all', inplace=True)
+    try:
+        rowdata.dropna(axis=1, how='all', inplace=True)
+    except TypeError:
+        return [
+            {'script': "",
+             'div': "",
+             'notes': ""
+             }]
+        
 
     if rowdata.empty:
         try:
@@ -6303,12 +6311,6 @@ def thumbnails_set(r, id, favorites):
              'notes': ""
              }]
 
-    #    else:
-    #        try:
-    #            rowdata.sort_values(by='time',ascending=True,inplace=True)
-    #        except KeyError:
-    #            pass
-
     lengte = len(rowdata)
     maxlength = 50
     if lengte > maxlength: