# Deploying changes to the real-time application

Changes to the real-time application can be deployed back to the controller. Deploying changes automatically discards any existing draft. Deploying changes includes checking the validity of the changes.

1. Start editing the real-time application.
2. In the menu bar, click Deploy.
3. The Deploy application dialogue is displayed.
4. Click Deploy, to start the upload.
5. Once the upload is finished, a dialogue is displayed.

6. If errors are displayed, edit your real-time application and check the changes again.

7. Select whether you want to start the real-time application immediately or just close the dialogue.

Choose from:

- Start: The real-time application starts immediately. The controller status changes to RUN. The real-time application opens in a new browser tab.
- Close: The dialogue is closed. The controller status changes to STOP.

If the operating state is EMPTY although you deployed a real-time application, check whether the physical setup of the u-control station matches the configured setup.

Starting the real-time application