diff --git a/parallel_examples/awsbatch/do_stitch.py b/parallel_examples/awsbatch/do_stitch.py
index bfa81c4..1ac02c9 100755
--- a/parallel_examples/awsbatch/do_stitch.py
+++ b/parallel_examples/awsbatch/do_stitch.py
@@ -152,10 +152,7 @@ def main():
 
                 userFunc = getattr(tilingstats, userFuncName)
                 tilingstats.calcPerSegmentSpatialStatsTiled(img, bandnum, 
-                    localDs, colInfo, userFunc, param)
-
-    # ensure closed before uploading
-    del localDs
+                    localOutfile, colInfo, userFunc, param)
 
     # upload the KEA file
     s3.upload_file(localOutfile, cmdargs.bucket, cmdargs.outfile)
diff --git a/pyshepseg/tilingstats.py b/pyshepseg/tilingstats.py
index 7b4b8c1..229dc9c 100644
--- a/pyshepseg/tilingstats.py
+++ b/pyshepseg/tilingstats.py
@@ -287,7 +287,7 @@ def calcPerSegmentStatsTiledRIOS(imgfile, imgbandnum, segfile,
 
     controls = applier.ApplierControls()
     controls.selectInputImageLayers([imgbandnum])
-    #controls.setWindowSize(tiling.TILESIZE, tiling.TILESIZE)
+    # controls.setWindowSize(tiling.TILESIZE, tiling.TILESIZE)
     
     # now create a new temporary file for saving the new columns too
     tempFileMgr = applier.TempfileManager(controls.tempdir)