Hi Ajeesh, If you want tecplot .dat file, please use FieldConvert session.xml input.fld output.dat If you want paraview .vtu file, please use FieldConvert session.xml input.fld output.vtu Cheers, Jacques ________________________________ From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of Ajeesh Mohan T <tajeeshmohan@gmail.com> Sent: Wednesday, February 14, 2024 7:44 AM To: nektar-users@imperial.ac.uk <nektar-users@imperial.ac.uk> Subject: [Nektar-users] FieldConvert fails to read Nek5000 output files Some people who received this message don't often get email from tajeeshmohan@gmail.com. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> This email from tajeeshmohan@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 nektar-users, I am trying to obtain tecplot readable formats from some Nek5000 outputs I already have; using the FieldConvert utility available in Nektar++ (It also supports the reading of data files from Nek5000 as claimed in the user guide). The command given to convert the nek5000 outputs to Nektar++ outputs is as follows; FieldConvert input.fld output.fld However, the output format (ASCII) of nek5000 is actually .fld followed by some numbers indicating the timesteps. The output for each timestep is written separately. FieldConvert fails to identify this format and listed the supported formats as .fld or .fld5000 while the second one is given specifically to read the Nek5000 outputs. I am not sure whether this is an old format of nek5000; anyway I did not find any information about this format online. I would like to kno if anyone tried this or have an idea whether FieldConvert still supports Nek5000 output files or not. Any help will be deeply appreciated. Thank you in advance. Warm regards, Ajeesh Mohan T, Doctoral Research Scholar, IIT Bombay, Mumbai, India.