[Freesurfer] mri_surf2vol cannot recognize the type of surf/lh.inflated

Hi all,

I need a volume that maps my sulci. So first I've run recon-all on my data. Worked like a charm. Visual verification in freeview shows that the inflated surface looks just about right (although it does not seem to be registered to the aparc+aseg volume). However, when I try to run mri_surf2vol, I get the error message "ERROR: cannot recognize the type of surf/lh.inflated".

My precise syntax was mri_surf2vol --o out.nii --identity casestudy2 --surf inflated --hemi --lh --surfval surf/lh.inflated

Can anyone advise me on this?

Best regards,

Lukas

PS :I'm running on FS version 5.3.0. PPS: Is it possible to achieve this from freeview rather than from the command line?