Im running a DTI analysis on 100 subjects. The first three steps ran well. I'm getting an error when I try to run the tbss_4_prestats. I searched the list and it seems like it is a memory problem. But I should not have that as I'm using a linux computer with 4Xeon CPU's and 16GB of RAM. So memory or processor requirements should not matter. I am sure someone had a similar problem. I would really aprreciate if someone could help. The text right from the time I start tbss_4_prestats is given below: "creating skeleton mask using threshold 2000 creating skeleton distancemap (for use in projection search) projecting all FA data onto skeleton /usr/local/fsl/bin/tbss_4_prestats: line 23: 16427 Aborted ${FSLDIR}/bin/tbss_skeleton -i mean_FA -p $t hresh mean_FA_skeleton_mask_dst ${FSLDIR}/etc/standard/lower-cingulum all_FA all_FA_skeletonised now run stats - for example: randomise -i all_FA_skeletonised -o tbss -m mean_FA_skeleton_mask -d design.mat -t design.con -n 5000 -c 3 -V (after generating design.mat and design.con)" the files created in the stats folder are as follows: all_FA.nii.gz mean_FA.nii.gz mean_FA_skeleton_mask.hdr MNI152.nii.gz target_to_MNI152.dof thresh.txt all_FA_skeletonised.hdr mean_FA_skeleton_mask_dst.hdr mean_FA_skeleton_mask.img target.hdr target_to_MNI152.hdr all_FA_skeletonised.img mean_FA_skeleton_mask_dst.img m ean_FA_skeleton.nii.gz target.img target_to_MNI152.img Thanks in advance, Cheers, Hima