New version of OpenLB was released. Download here OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Errors in grid refinement example cases in openlb-1.8.0 › Reply To: Errors in grid refinement example cases in openlb-1.8.0 May 7, 2025 at 7:16 am #10171 mwkimParticipant Yes, I can not compile any case. I will try your suggestion and update the results! I appreciate your help:)