[Freesurfer] Register.dat for mri_volcluster

FreeSurfers,

I am using mri_volcluster on the output of a fixed-effects analysis, but am getting an error regarding my register.dat file. The register.dat file I'm directing mri_volcluster to is in the group's tal-ffx directory and lists subject "talairach". mri_volcluster is thus looking for subject "talairach" in my SUBJECTS_DIR. The problem is there's no such subject in SUBJECTS_DIR. Here's the message-ERROR: cannot find subject talairach in /exp/REfMRI/mg_2_21/structurals/.

How do I fix this? Is a Talairach subject supposed to be put in SUBJECTS_DIR when I run func2tal-sess, or is this a part of a library I should have somewhere? Or do I create this file?

Any help would be appreciated. Thanks!

Dan Dillon