diff --git a/spaceapi/utils.py b/spaceapi/utils.py
--- a/spaceapi/utils.py
+++ b/spaceapi/utils.py
@@ -13,7 +13,7 @@ last_state_file_v14 = os.path.abspath("l
 
 if not os.path.exists(default_json_file_v14):
     raise RuntimeError("default_v14.json does not exists!")
-elif not os.path.isfile(default_json_file):
+elif not os.path.isfile(default_json_file_v14):
     raise RuntimeError("default_v14.json is not a file!")