New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Heidelberg/Germany in March 2024 OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Defining Material Numbers › Reply To: Defining Material Numbers June 18, 2020 at 7:59 pm #5036 michael.gianfeliceParticipant My mistake, it is working fine now! Thank You, Mathias