[f1fan]

Hello,
As you can see on image (error2), my interfaces behave like a wall but they still let through the air at the same time to more internal space of mesh. I've made some streamlines to check if it was true and that confirmed my suspitions.
I've checked if the contacts are made but they seem ok (error3). I don't know if it's normal, but the surfaces that are connected to contacts have type wall. I never checked interfaces before, since I always import geometry from Solidworks, so contacts are automatically set. I couldn't change their type or delete them, so I think it's ok, but I wanna include it anyway in this problem summary.
I also found some info in command center about creating surface from sliding interface (error4), but from other topics on forum I didn't found solution (mainly because most of them relate to topic created in 00', so the GUI of Ansys looked much different). I don't know if it's even relevant to problem, but I wanna include it anyway.
I also wanna mention that I imported mesh file from Ansys 2023 to Ansys 2019. I did it before a couple of times and I never had problem with interfaces, but maybe it's relevant to my case.
Anyone had a problem like this?