diff --git a/edit_data_form.py b/edit_data_form.py
index c4ca2d6..b158b23 100755
--- a/edit_data_form.py
+++ b/edit_data_form.py
@@ -4,7 +4,7 @@
 import npyscreen
 import json
 import datetime
-from sys import argv
+import sys
 import pathlib
 
 from base_data_model import base_data_model
@@ -57,18 +57,21 @@ class FormApp(npyscreen.NPSAppManaged):
         return pathlib.Path(filename).name == 'example.json'
 
 def main(*_args):
-    if len(argv) > 1:
-        filename = argv[1]
+    if len(sys.argv) > 1:
+        file_path = pathlib.Path(sys.argv[1])
+        if not file_path.exists():
+            print("Trying to open nonexistent file. Aborting.")
+            sys.exit(0)
     else:
-        filename = pathlib.Path(pathlib.Path(__file__).absolute().parent, 'example.json')
+        file_path = pathlib.Path(pathlib.Path(__file__).absolute().parent, 'example.json')
 
-    app = FormApp(filename)
+    app = FormApp(file_path)
 
     try:
         app.run()
     except Exception as e:
         print(e)
-        return 0    
+        sys.exit(0)
     
     if app.data_has_changed():
         out_data = app.get_data_from_form()