My Project is for a science fair, and I am trying to make a very aerodynamic car and need to run a aerodynamic simulation and it keeps giving me an error

When ever I try to start the simulation it gives me this error, “A setup with at least 7 regions is being used in a single-region analysis type. Please ensure that only one fluid region exists and that all other bodies are assigned to an advanced concept. If you have already meshed your geometry, ensure that all the meshing regions except one are cell zones.” What does this error mean and how do I fix it?

Hello srambert,
thanks for reaching out to us here in the forum.

Please have a look at this article on how to solve this issue:

Also please have a look at this tutorial which explains on how to create a flow region for a car.

Best regards