I tried the same command again, this time trying to catch the error earlier. Any thoughts on why it's killed at line 94? $ tbss_deproject FA_results_095.nii.gz 3 de-projecting <skeleton-space-image> into all_FA (nonlinearly aligned) subject space output will be FA_results_095_to_all_FA /home/fsl4/fsl/bin/tbss_deproject: line 94: 25818 Killed $FSLDIR/bin/tbss_skeleton -i mean_FA -p `cat thresh.txt` mean_FA_skeleton_mask_dst $FSLDIR/data/standard/LowerCingulum_1mm all_FA ${IN}_tmp -D $IN de-projection done now creating inverse warp fields... ** ERROR (nifti_image_read): failed to find header file for 'FA_results_095_to_all_FA' ** ERROR: nifti_image_open(FA_results_095_to_all_FA): bad header info Error: failed to open file FA_results_095_to_all_FA Cannot open volume FA_results_095_to_all_FA for reading!