diff --git a/rowers/dataroutines.py b/rowers/dataroutines.py
index aa562ba2..69658d1f 100644
--- a/rowers/dataroutines.py
+++ b/rowers/dataroutines.py
@@ -1981,7 +1981,20 @@ def dataplep(rowdatadf, id=0, inboard=0.88, forceunit='lbs', bands=True, barchar
     if rowdatadf.empty:
         return 0
 
-    df = pl.from_pandas(rowdatadf)
+    try:
+        df = pl.from_pandas(rowdatadf)
+    except ArrowInvalid:
+        for k, v in dtypes.items():
+            try:
+                rowdatadf[k] = rowdatadf[k].astype(v)
+            except KeyError:  # pragma: no cover
+                pass
+        try:
+            df = pl.from_pandas(rowdatadf)
+        except ArrowInvalid:
+            return dataprep(rowdatadf, id=id, inboard=inboard, forceunit=forceunit, bands=bands, barchart=barchart,
+                            otwpower=otwpower, debug=debug,polars=True)
+
 
     df = df.with_columns((pl.col("TimeStamp (sec)")-df[0, "TimeStamp (sec)"]).alias("TimeStamp (sec)"))
     df = df.with_columns((pl.col(" Stroke500mPace (sec/500m)").clip(1,3000)).alias(" Stroke500mPace"))
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
index 4623d996..e9790191 100644
Binary files a/rowers/tests/testdata/testdata.tcx.gz and b/rowers/tests/testdata/testdata.tcx.gz differ