Dear Freesurfer experts,

I used freesurfer v4.3.0 on anatomical data (T1).

I am trying to segment hippocampal subfields with the following command: 

recon-all -s subjname -hippo-subfields

unfortunately I get the following error:

ERROR: Flag -hippo-subfields unrecognized

I have already the files aseg.mgz, nu.mgz, talairach.xfm

Does this error occur because I am using an old Freesurfer version?

If this is the case which is the optimal version to run hippocampal segmentation? Should I process my whole data again with the newest version? Unfortunately I did not find any convincing answer from the posting list where I had the impression that version 5.1 is facing some problems regarding hippocampal segmentation.

Thank you very much and kind regards,

Lorenzo Pasquini