Hi YiLin You need to set the NEKTAR_USE_MPI option to compile for multi-core processing. Cheers, Spencer. On 22 Feb 2022, at 03:00, Paul Liu <liuyilin.liu@gmail.com<mailto:liuyilin.liu@gmail.com>> wrote: This email from liuyilin.liu@gmail.com<mailto:liuyilin.liu@gmail.com> originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list<https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email stamping for this address. Hi Everyone, I was just wondering if there are specific flags or other instructions that need to be set to compile nektar++ for multi-core processing. The main reason is that I am trying to run a 16 core job and I am often encountering a "c group out of memory" exception and I think it might be due to me not compiling things properly for mullti-core processing. Thank you YiLin Liu 403-397-3457 liuyilin.liu@gmail.com<mailto:liuyilin.liu@gmail.com> MASc Student at CML<https://cml.mech.ubc.ca/> UBC _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users