So, it will complete the first subject successfully, but not the 2nd?  Sounds like a consult with your local IT may be warranted.

Anyway, I wrote to say that you should take advantage of the file we provide to correct for the effect of the gradient nonlinearity on the bvec directions, using the following command:
dtifit -k data -r bvecs -b bvals -m nodif_brain_mask -o dti --gradnonlin=grad_dev

cheers,
-MH

-- 
Michael Harms, Ph.D.
-----------------------------------------------------------
Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
660 South Euclid Ave. Tel: 314-747-6173
St. Louis, MO  63110 Email: [email protected]

From: <Chiu>, "Bryan (PHTH)" <[email protected]>
Date: Monday, May 4, 2015 3:31 PM
To: "[email protected]" <[email protected]>
Subject: [HCP-Users] Help with dtifit on participants

Hi,

I am trying to run dtifit on the HCP data through FSL, using the following bash script:

for dir in /mnt/win/HCP/*;

    do

        (cd $dir/T1w/Diffusion && dtifit -k data -o data_dtifit -m nodif_brain_mask -r bvecs -b bvals);

    done


Except it won't run to completion; it will instead hang indefinitely after completing the first participant and the NAS I am connected to appears to hang on this connection. I have done some troubleshooting on this but I am completely stumped. This is my first attempt at bash scripting and FSLDTI.


Any help would be appreciated,

_______________________________________

Bryan Chiu
Undergraduate Research Assistant
Aging, Mobility, and Cognitive Neuroscience Lab
Djavad Mowafaghian Centre for Brain Health
Department of Physical Therapy
Faculty of Medicine
University of British Columbia

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