Lola CURIEN

Hello, thank you for your answer. However, I tried your advice and I received the error message below. I think it has something to do with my Ventsim model which was originally a DXF. But I don't understand the error message. Thanking you in advance for your answer

Hello, I have only been working on the ventsim software for a few months. Right now I'm modeling a tunnel. I would like to know if it is possible to model a mountain above the galleries. I have the altitude difference between the different points of the gallery and the top of the mountain. This would allow me to make a more accurate simulation of the temperature in the gallery. In thanking you, CURIEN Lola