OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Stderr When Running OpenLB in Parallel Across High Number of Cores › Reply To: Stderr When Running OpenLB in Parallel Across High Number of Cores January 24, 2022 at 2:16 pm #6266 AdrianKeymaster Can you share your config.mk and the script / command you used to run this? Did you test the 8 and 50 core executions on the exact same node?