Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › STL file Import Error › Reply To: STL file Import Error November 23, 2021 at 7:02 pm #6194 achodankarParticipant Hello Mathias, This explanation is very helpful. Thank you. Yours sincerely, Abhijeet C.