diff --git a/Libs/swig/dataset.py b/Libs/swig/dataset.py
index 7a98c133..f16039ce 100644
--- a/Libs/swig/dataset.py
+++ b/Libs/swig/dataset.py
@@ -384,7 +384,7 @@ def pick_quality_from_size(size, dtype_str, q_max, base_elems_q1=2):
 		# Assert(quality<=0)
 		temp_qual=quality
 		bit_length=len(self.getBitmask().toString())-1
-		if temp_qual!=0:
+		if size!=None:
 			quality = pick_quality_from_size(size, self.getField().dtype.toString(), bit_length)
 		temp_qual=quality
 		if temp_qual<=0:
@@ -880,3 +880,4 @@ def read(self, logic_box=None, x=None, y=None, z=None, u=None,v=None, field_name
 		elif type(z) is not tuple:
 			data = data[0,:,:]
 		return data
+
diff --git a/Libs/swig/setup.py b/Libs/swig/setup.py
index 96ec5c0f..7dced713 100644
--- a/Libs/swig/setup.py
+++ b/Libs/swig/setup.py
@@ -7,7 +7,7 @@
 	pass
 
 # the following line can be replaced automatically by `NewTag` so be careful not to change its format
-PROJECT_VERSION="2.2.142"
+PROJECT_VERSION="2.2.146"
 
 # I can override by env variable
 if "PROJECT_VERSION" in os.environ:
@@ -33,8 +33,8 @@ def DoSetup():
 	shutil.rmtree('./dist', ignore_errors=True)	
 	shutil.rmtree('./.git', ignore_errors=True)	
 	shutil.rmtree('./tmp', ignore_errors=True)	
-	shutil.rmtree('./{}.egg-info'.format("OpenVisus"), ignore_errors=True)	
-	shutil.rmtree('./{}.egg-info'.format("OpenVisusNoGui"), ignore_errors=True)	
+	shutil.rmtree('./openvisus.egg-info'.format(""), ignore_errors=True)	
+	shutil.rmtree('./openvisusnogui.egg-info'.format(""), ignore_errors=True)	
 	files=[]	
 	for dirpath, __dirnames__, filenames in os.walk("."):
 		for it in filenames:
@@ -46,11 +46,11 @@ def DoSetup():
 	
 	# special name for no-gui
 	# see https://github.com/opencv/opencv-python/blob/master/setup.py
-	package_name="OpenVisus"
+	package_name="openvisus"
 	
 	# special case no gui
 	if not os.path.isfile(os.path.join(this_dir,"QT_VERSION")):
-		package_name="OpenVisusNoGui"	
+		package_name="openvisusnogui"	
 	
 	# dependency on numpy removed otherwise I have problems with conda which downgrade numpy for unknown reasons
 	setuptools.setup(