small bug fix reading parquet files

rowers/dataprep.py

@@ -31,6 +31,7 @@ import dask.dataframe as dd
 from dask.delayed import delayed
 import pyarrow.parquet as pq
 import pyarrow as pa
+
 from pyarrow.lib import ArrowInvalid
 
 from django.utils import timezone
@@ -2379,7 +2380,7 @@ def read_df_sql(id):
     try:
         f = 'media/strokedata_{id}.parquet.gz'.format(id=id)
         df = pd.read_parquet(f)
-    except OSError:
+    except (OSError,ArrowInvalid):
         rowdata,row = getrowdata(id=id)
         if rowdata and len(rowdata.df):
             data = dataprep(rowdata.df,id=id,bands=True,otwpower=True,barchart=True)