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Hi Charlie again, If the error persists, would you mind to share the data with me? I can try to reproduce the error and check if there is a bug in the code. Moises. On 29 August 2017 at 10:12, Moises Hernandez <[log in to unmask]> wrote: > Hi Charlie, > > That exception happens when the application accesses to a voxel out of the > volume or a position that does not exist. > Do all your masks have exactly the same dimensions? They should. > It seems that the third mask specified in mask.txt (volume2) is causing > the problem. > What happens if you remove it? > > Moises. > > > On 26 August 2017 at 07:48, Charlie Lou <[log in to unmask]> wrote: > >> Dear Experts, >> >> I was running probtrackx for performing probabilistic tractography and >> using 90 masks from AAL template for obtaining white matter network. The >> terminal showed as follow: >> >> mkdir -p /home/charile/data/Lou_DTI/ab100358_pn >> /usr/share/fsl/5.0/bin/probtrackx2 --network -x >> /home/charile/data/Lou_DTI/ab100358_pn/masks.txt -l --onewaycondition >> --omatrix1 -c 0.2 -S 2000 --steplength=0.5 -P 5000 --fibthresh=0.01 >> --distthresh=0.0 --sampvox=0.0 --xfm=/home/charile/data/Lou_M >> NI_to_B0/ab100358_MNI_to_B0_warp.nii.gz --invxfm=/home/charile/data/Lo >> u_MNI_to_B0/ab100358_B0_to_MNI_warp.nii.gz --forcedir --opd -s >> /home/charile/data/Lou_DTI/ab100358.bedpostX/merged -m >> /home/charile/data/Lou_DTI/ab100358.bedpostX/nodif_brain_mask >> --dir=/home/charile/data/Lou_DTI/ab100358_pn >> Log directory is: /home/charile/data/Lou_DTI/ab100358_pn >> Running in network mode >> load seeds >> Load bedpostx samples >> 1_1 >> 1_2 >> 1_3 >> 2_1 >> 2_2 >> 2_3 >> >> nfibres : 2 >> nsamples : 50 >> >> Done loading samples. >> Volume seeds >> volume 0 >> volume 1 >> volume 2 >> >> and then error happened. It showed as 'Errors: terminate called after >> throwing an instance of 'NEWMAT::IndexException'. And then the calculation >> terminated. Where did it go wrong? The masks of each 90 regions were >> generated through WFU PickAtlas Tool. >> >> Hope anyone could help me with it. >> >> Best regards >> Charlie >> > >