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 7:18 am #5184 mathiasKeymaster That is the dependency file. The executable is “bstep2d” — there is no ending. You may execute it by typing “./bstep2d” and return. Best Mathias