Can a similar approch be used if you're getting this error while running TBSS_non_FA? I am trying (failing) to get the all_MD_skeletonized with this error: projecting all_MD onto mean FA skeleton /home/ssorg/fsl4/fsl/bin/tbss_non_FA: line 104: 18925 Killed ${ FSLDIR}/bin/tbss_skeleton -i mean_FA -p $thresh mean_FA_skeleton_mask_dst ${FSLD IR}/data/standard/LowerCingulum_1mm all_FA all_${ALTIM}_skeletonised -a all_$ALT IM Splitting the all_FA and all_MD files is an appealing solution, but would it work? -S