Dear freesurfer experts,

I was trying to use synthseg for segmenting and parcellating a heterogeneous brain with lesions. It is advised in the freesurfer synthseg webpage to use mri_WMHsynthseg command for these cases. How ever when I tried to run the command, it shows that command not found. I checked mri_synsthseg command works. What shall I do to resolve this? Is there a way to install the mri_WMHsynthseg or is it part of some existing commands? 

Regards,

Naveen Kumar