diff --git a/4_process_planet_file.py b/4_process_planet_file.py
index 0889e23..d0694c4 100644
--- a/4_process_planet_file.py
+++ b/4_process_planet_file.py
@@ -56,6 +56,8 @@ def nodecache_file_filepath_based_on_planet_location(pbf_file_filepath):
 def planet_file_filepath():
     location_code = "planet" # TODO: defined in two separate places
     pbf_file_filepath = None
+    if os.path.isdir(config.planet_download_folder()) == False:
+        return None
     for filename in os.listdir(config.planet_download_folder()):
         file_path = os.path.join(config.planet_download_folder(), filename)
         if os.path.isfile(file_path):