adding more data filtering exception catching

rowers/views/analysisviews.py

@@ -2482,11 +2482,18 @@ def history_view_data(request, userid=0):
         meters, hours, minutes, seconds = get_totals(a_workouts)
         totalseconds = 3600 * hours + 60 * minutes + seconds
         ddf = getsmallrowdata_pl(columns, ids=[w.id for w in a_workouts])
+        if ddf.is_empty():
+            totalscript = ""
+            totaldiv = "No data"
 
         try:
             ddf = ddf.with_columns(pl.col("time").diff().clip(lower_bound=0).alias("deltat"))
         except KeyError:
             pass
+        except ColumnNotFoundError:
+            totalscript = ""
+            totaldiv = "No data"
+            
 
         ddf = dataprep.clean_df_stats_pl(ddf, workstrokesonly=True,
                                       ignoreadvanced=True)