while running tbss_3_postreg -S on 250 subject we got a memory error.however when running it on 30 subjects all was OK.how can we create the mean FA image and skeletonise it for all subjects?we run Linux Cenots 4 with:IntelCore2 Quad CPU @2.40 Ghz4 GB ram memoryHD space of 200 GBThank youAsaf