HI, If you move the directory caseName_0.chk to caseName.fld then the code should read the initial conditions from these parallel files using the syntax you have suggested below. It checks to see if it is a filename or a directory and reads the files according to this. Cheers, Spencer. From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of Ehsan Asgari <eh.asgari@gmail.com> Date: Monday, 13 March 2023 at 11:55 To: nektar-users <nektar-users@imperial.ac.uk> Subject: [Nektar-users] restarting a parallel simulation This email from eh.asgari@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 Everone, I have a parallel simulation with a created directory of the initial conditions (caseName_0.chk). There are 64 processes and inside the directory, I see P0000000.fld up to P0000063.fld. Now the question is, what should I change within the session file if I'd like to restart the simulation from these initial conditions? Should it be something like: <F VAR="u,v,w,p" FILE="caseName.fld" /> I wonder if this is correct, as I have no single file named "caseName.fld". Kind regards syavash