New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › I can’t run bstep2d › Reply To: I can’t run bstep2d September 30, 2020 at 9:49 am #5187 mathiasKeymaster Post the error message and a screenshot of the files availabe after typing “ll”