Can't run simulation due to two regions error

Here’s the link: SimScale Login if the link doesn’t work the project is called “turbine” by bkunkov. thank you so so much in advance!

Before running the simulation for my incompressible sim, I get this error:
ss 2024-03-23 at 21.07.05

" A setup with at least 2 regions is being used in a single-region analysis type. Please delete CAD regions that are irrelevant for the simulation. If all CAD regions are relevant, ensure that only one region is assigned to the material and that all other bodies are assigned to advanced concepts."

How do I fix this? I’ve searched everywhere and can’t get an answer, though it seems to be a pretty simple one. All I have is an airfoil. I’m testing an airfoil.
thanks again!

Hello, make sure to check this tutorial, in particular figure 6.

In short, you will need to delete the solid wing after creating the flow region.


Thank you so much Ricardo!!!