fix

src/heurams/interface/__main__.py

@@ -27,5 +27,8 @@ class HeurAMSApp(App):
     def on_button_pressed(self, event: Button.Pressed) -> None:
         self.exit(event.button.id)
 
+def environment_check():
+    from heurams.context import working_var
+
 app = HeurAMSApp()
-app.run()
+app.run()