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Dear FreeSurfer developers, I cannot seem to get "mri_segment_hypothalamic_subunits" to work using the virtualbox installation of FS-7.2.0. I have a subject that ran to completion using recon-all, but when I tried to obtain the additional segmentation I keep getting "Illegal instruction (core dumped)". I have tried several permutations of the command (see below)(I did not include some of the extended syntax permutations (--sd, etc) in the list below, but I did try several - -> Illegal etc) It occurred to me that I should just attempt to see if the "help" command would work, so I simply copied the syntax directly from the wiki page mri_segment_hypothalamic_subunits -h... and as you can see below, that also returned "Illegal instruction (core dumped)". I even tried a direct copy of the syntax for "bert".  No joy.

Is this module actually implemented in the VM?Are there any suggestions regarding syntax, where the command is executed, etc.? Thanks in advance for any help you can offer. -Randy

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx developer@developer-VirtualBox:/$ lsbin    dev   initrd.img      lib64       mnt   root  snap      sys  varboot   etc   initrd.img.old  lost+found  opt   run   srv       tmp  vmlinuzcdrom  home  lib             media       proc  sbin  swapfile  usr  vmlinuz.old developer@developer-VirtualBox:/$ mri_segment_hypothalamic_subunits --s WBI-FES_S_0862 --write_posteriorsIllegal instruction (core dumped)developer@developer-VirtualBox:/$ pwd/developer@developer-VirtualBox:/$ cd /usr/local/freesurfer/7.2.0/subjects/developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits --s bertIllegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits --hIllegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits --helpIllegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits -helpIllegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits -hIllegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$ mri_segment_hypothalamic_subunits --s WBI-WCM_S_0862 --write_posteriors --crop 1000Illegal instruction (core dumped)developer@developer-VirtualBox:/usr/local/freesurfer/7.2.0/subjects$

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx -------- freesurfer-linux-ubuntu18_x86_64-7.2.0-20210721-aa8f76b --------Setting up environment for FreeSurfer/FS-FAST (and FSL)FREESURFER_HOME   /usr/local/freesurfer/7.2.0FSFAST_HOME       /usr/local/freesurfer/7.2.0/fsfastFSF_OUTPUT_FORMAT nii.gzSUBJECTS_DIR      /usr/local/freesurfer/7.2.0/subjectsMNI_DIR           /usr/local/freesurfer/7.2.0/mnideveloper@developer-VirtualBox:~$