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Hi Douglas!

Thank you for the response. I figured out it was simply an issue with the pathing to the register.dat file!

Thanks, *Daniel Callow* *PhD Student, Neuroscience and Cognitive Science* Exercise for Brain Health Lab University of Maryland, College Park *ddcc2442@gmail.com ddcc2442@gmail.com* 443-254-6298

On Tue, Feb 19, 2019 at 3:52 PM Greve, Douglas N.,Ph.D. < DGREVE@mgh.harvard.edu> wrote:

what do you get when you run ls -l /Volumes/DANIEL/dti_freesurf/dtrecon/AES139.Rest/register.dat

On 2/19/19 8:44 AM, Daniel Davidson Callow wrote:

...

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Hello,

I ran a successful dt_recon and then wanted to use

mri_vol2vol --mov $subj_dir/dtrecons/${subj}.${cond}/lowb.nii.gz --targ $subj_dir/diffusion_recons/${subj}.${cond}/mri/aparc+aseg.mgz --inv --interp nearest --o $subj_dir/dtrecons/${subj}.${cond}/aparc+aseg2diff.nii.gz --reg $subj_dir/dtrecon/${subj}.${cond}/register.dat --no-save-reg

to get the anatomical segmentations into diffusion space. However, when running the above code I get the following error message?

echo subj =AES139 , cond =Rest

subj =AES139 , cond =Rest

set echo

cd /Volumes/DANIEL/dti_freesurf

mri_vol2vol --mov /Volumes/DANIEL/dti_freesurf/dtrecons/AES139.Rest/lowb.nii.gz --targ

/Volumes/DANIEL/dti_freesurf/diffusion_recons/AES139.Rest/mri/aparc+aseg.mgz

...

--inv --interp nearest --o /Volumes/DANIEL/dti_freesurf/dtrecons/AES139.Rest/aparc+aseg2diff.nii.gz --reg /Volumes/DANIEL/dti_freesurf/dtrecon/AES139.Rest/register.dat --no-save-reg

regio_read_register(): No such file or directory

Could not open /Volumes/DANIEL/dti_freesurf/dtrecon/AES139.Rest/register.dat

Matrix from regfile:

MatrixPrint: mat = NULL!

No such file or directory

I have attached an example register.dat file in case that is the issue.

also the output for ls -l register.dat

-rwxrwxrwx1 administratorstaff323 Feb 18 13:59 register.dat

Any advice with troubleshooting is greatly appreciated!

Best,

*Daniel Callow* /PhD Student, Neuroscience and Cognitive Science/ Exercise for Brain Health Lab University of Maryland, College Park dcallow@umd.edu mailto:dcallow@gmail.com 443-254-6298

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