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 › Compilation error › Reply To: Compilation error November 3, 2023 at 3:44 pm #7882 Ali FauzeParticipant Dear community, I resolved the problem using the functor IndicatorCircle3D. BR. Ali