Hi Anastasia, I believe the issue I had with the pathstats.byvoxel.txt not displaying the last four values (AD_Avg RD_Avg MD_Avg FA_Avg ) is owing to the fact that trac-all was run with FREESURFER 5.1. I believe that FREESURFER 5.2 may be needed to generate path.pd.trk, and from that, the above values are derived. Is this correct? Thank you again, and have a good day!