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Dear FSL users, I'm trying to run TBSS for axial diffusion (tbss_non_FA Axial) but it's stuck while running randomise for t-test 2. "tbss_non_FA Axial" command ended fine with message: -------------------------------------------------- merging all upsampled Axial images into single 4D image projecting all_Axial onto mean FA skeleton now run stats - for example: randomise -i all_Axial_skeletonised -o tbss_Axial -m mean_FA_skeleton_mask -d design.mat -t design.con -n 500 --T2 -V (after generating design.mat and design.con) ---------------------------------------------------- And when I ran the command, "randomise -i all_Axial_skeletonised -o tbss_Axial -m mean_FA_skeleton_mask -d design.mat -t design.con -n 500 --T2 -V" it did the following: Loading Data: *************************************************** Data loaded 2.29592e+14 permutations required for exhaustive test of t-test 1 Doing 500 random permutations Starting permutation 1 (Unpermuted data) Starting permutation 2 . . . Starting permutation 499 Starting permutation 500 2.29592e+14 permutations required for exhaustive test of t-test 2 Doing 500 random permutations Starting permutation 1 (Unpermuted data) Starting permutation 2 AND IT HAS BEEN STUCK HERE FOR LAST THREE DAYS. I'll appreciate your help to figure out what might be going wrong here. The FA analysis worked fine. Regards, Dinesh