diff --git a/chipstream/manager.py b/chipstream/manager.py
index 58dfb37..f5968e9 100644
--- a/chipstream/manager.py
+++ b/chipstream/manager.py
@@ -142,7 +142,9 @@ def run_all_in_thread(self,
         self._worker.start()
 
     def set_output_path(self, path_out):
-        self._path_out = pathlib.Path(path_out)
+        if path_out is not None:
+            path_out = pathlib.Path(path_out)
+        self._path_out = path_out
 
 
 class ErrorredRunner: