OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › I can’t run bstep2d › Reply To: I can’t run bstep2d October 1, 2020 at 4:51 am #5192 BhuttuParticipant Hello Souhaila, As I can see in the second image that you posted, the first file is the executable file. Now in the terminal just type ./bstep2d and it will execute this file and you should get some output on your terminal. Best Bhuttu