******************* 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. ******************* Hello, I am trying to convert the DNS data from NEK5000 (.f%5d files such as cyl0.f00001) to NEKTAR++ .fld/chk files using the following command: *FieldConvert cyl0.f00001 cyl_0.fld* The conversion fails with the following error: Field contains unknown variable: X [virgo1:10341] *** Process received signal *** [virgo1:10341] Signal: Aborted (6) [virgo1:10341] Signal code: (-6) [virgo1:10341] [ 0] /lib64/libpthread.so.0(+0xf630)[0x7f8b79596630] [virgo1:10341] [ 1] /lib64/libc.so.6(gsignal+0x37)[0x7f8b791ef387] [virgo1:10341] [ 2] /lib64/libc.so.6(abort+0x148)[0x7f8b791f0a78] [virgo1:10341] [ 3] /home/manukv/local/nektar/lib64/libFieldUtils.so.5.8.0(_ZN6Nektar10FieldUtils12InputNek50009v_ProcessERN5boost15program_options13variables_mapE+0x198b)[0x7f8b8085b63b] [virgo1:10341] [ 4] FieldConvert[0x4219e5] [virgo1:10341] [ 5] FieldConvert[0x41e777] [virgo1:10341] [ 6] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f8b791db555] [virgo1:10341] [ 7] FieldConvert[0x4210ed] [virgo1:10341] *** End of error message *** Aborted (core dumped) Has anyone figured out how to solve this issue ? It would be a great help.I have attached the NEK5000 file for reference. Thanks! Regards, *Gaurav Gupta* Scientist/Engineer-SC Space Applications Centre, ISRO Ahmedabad, GJ, India