******************* This email 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. ******************* Dear all, I am trying to calculate a base flow with the steady-state solver using selective frequency damping. Recently, an error, shown in the picture below, was given when I tried to run in parallel the IncNavierStokesSolver for my new mesh-refined case using mpirun -np: [cid:53ae808d-8f8c-4062-9c1e-374f9c477a1c] However, this error has never occurred before when: 1.using serial running for the same session file/ setting of this mesh-refined case; 2.using parallel running for other cases so far, which are all with much coarser meshes; So I want to know what triggered this kind of problem and how to deal with it. Thanks in advance for the help. Best regards, Mona.