diff --git a/meteor/downloader.py b/meteor/downloader.py
index f684412..a26e976 100644
--- a/meteor/downloader.py
+++ b/meteor/downloader.py
@@ -23,6 +23,7 @@
 import tarfile
 import json
 from typing import ClassVar
+import sys
 
 
 @dataclass
@@ -47,8 +48,9 @@ def load_catalogues_config() -> dict:
             with importlib.resources.as_file(config_data) as configuration_path:
                 with configuration_path.open("rt", encoding="UTF-8") as config:
                     return json.load(config)
-        except AssertionError:
+        except FileNotFoundError:
             logging.error("The file %s is missing in meteor source", Downloader.CONFIG_DATA_FILE.name)
+            sys.exit(1)
     
     @staticmethod
     def get_available_catalogues() -> list[str]:
diff --git a/meteor/meteor.py b/meteor/meteor.py
index d42a2fb..9996bd6 100644
--- a/meteor/meteor.py
+++ b/meteor/meteor.py
@@ -667,10 +667,10 @@ def main() -> None:  # pragma: no cover
     """
     Main program function
     """
-    # Get arguments
-    args = get_arguments()
     # Let us logging
     logger = get_logging()
+    # Get arguments
+    args = get_arguments()
     # version = importlib.metadata.version("meteor")
     # print("Meteor version", version)
     # Create a meteor dataset