I have download the latest verion of mri_segstats from the release notes. But it does not generate asegstats.
4 x86_64 x86_64 GNU/Linux #-------------------------------------------- #@# ASeg Stats Tue Oct 2 07:36:17 CEST 2012 /home/knutjb/freesurfer/20_ucsd_automatic_version2/004
mri_segstats --seg mri/aseg.mgz --sum stats/aseg.stats --pv mri/norm.mgz --empty --excludeid 0 --excl-ctxgmwm --supratent --subcortgray --in mri/norm.mgz --in-intensity-name norm --in-intensity-units MR --etiv --surf-wm-vol --surf-ctx-vol --totalgray --ctab /usr/local/freesurfer/ASegStatsLUT.txt --subject 004
ERROR: Option --sum unknown
#------------------------------------------
recon-all -s 004 finished without error at Tue Oct 2 07:36:17 CEST 2012 done
knutjb@dmed4960:~/freesurfer/20_ucsd_automatic_version2$ mri_segstats USAGE: mri_label2vol
Possible inputs: --label labelid <--label labelid> --annot annotfile : surface annotation file --seg segpath : segmentation --aparc+aseg : use aparc+aseg.mgz in subjectdir as seg
--temp tempvolid : output template volume
--reg regmat : VolXYZ = R*LabelXYZ --regheader volid : label template volume (needed with --label or --annot) for --seg, use the segmentation volume --identity : set R=I --invertmtx : Invert the registration matrix
--fillthresh thresh : between 0 and 1 (def 0) --labvoxvol voxvol : volume of each label point (def 1mm3) --proj type start stop delta
--subject subjectid : needed with --proj or --annot --hemi hemi : needed with --proj or --annot --surf surface : use surface instead of white
--o volid : output volume --hits hitvolid : each frame is nhits for a label --label-stat statvol : map the label stats field into the vol --stat-thresh thresh : only use label point where stat > thresh --offset k : add k to segmentation numbers (good when 0 should not be ignored)
--native-vox2ras : use native vox2ras xform instead of tkregister-style --version : print version and exit --help
$Id: mri_label2vol.c,v 1.39 2012/06/08 17:29:54 greve Exp $
knutjb@dmed4960:~/freesurfer/20_ucsd_automatic_version2$ mri_segstats --sum ERROR: Option --sum unknown
Knut J