# Troubleshooting connection issues

If the simulator is not running, smartCARS 3 may not be able to connect. Double-check that you are at an airport from which you have a dispatched flight departing. For support, you can try our [Discord](https://discord.gg/CSujGGgyv3), or escalate to [TFDi Design support](https://support.tfdidesign.com/support/home).