Hi Maarten,

you can use Matrix3:

--omatrix3 --target3='seeds' --lrtarget3='wholebrain'

Best,
Moises.

On 10 July 2015 at 11:12, Maarten Vaessen <[email protected]> wrote:

> Thanks for the reply. I am using FSL v5.0.8, but have also tried with
> 5.0.6.
>
> Does that mean that there is no way to do seed-to-wholebrain connectivity
> based on surfaces right now? Or is it possible to do a similar thing using
> one of the other --omatrix options?
>
> -M
>
>
> On Thu, Jul 9, 2015 at 5:49 PM, Glasser, Matthew <[email protected]>
> wrote:
>
>>  That error suggests that that particular flag is not ready for surfaces
>> yet and is looking for a NIFTI volume.  Do you have the latest version of
>> FSL?  Perhaps Stam can comment on whether --target2 will be able to handle
>> surfaces in the future.
>>
>>  Peace,
>>
>>  Matt.
>>
>>   From: <[email protected]> on behalf of Maarten
>> Vaessen <[email protected]>
>> Date: Thursday, July 9, 2015 at 9:43 AM
>> To: "[email protected]" <[email protected]>
>> Subject: [HCP-Users] probtrackx2 surface tracking in matrix2 mode
>>
>>   Hello experts,
>>
>>  I am trying track from a seed surface roi to all WM surface vertices
>> using matrix2 mode in probtackx2 using data from the HCP. I have followed
>> the guide on how to convert surfaces using the surf2surf command where
>> necessary. However I get this error when running probtrackx2
>>
>>  Done loading samples.
>> Image Exception : #22 :: ERROR: Could not open image
>> ../fsaverage_LR32k/102816.L.white.32k_fs_LR.surf.gii
>> terminate called after throwing an instance of 'RBD_COMMON::BaseException'
>> Aborted
>>
>>  I am not sure what is wrong, the file is definitely there. Moreover
>> when I take this file as the seed (-x
>> ../fsaverage_LR32k/102816.L.white.32k_fs_LR.surf.gii), there is no error
>> when loading the seeds:
>>
>>  Running in seedmask mode
>> load seeds
>> read gifti
>> done.
>>
>>  Here is the full command:
>>
>>  probtrackx2 -x L.STS.fsl.gii --onewaycondition --omatrix2
>> --target2=../fsaverage_LR32k/102816.L.white.32k_fs_LR.surf.gii -P 50
>> --forcedir --dir=./test_surf_track_STS_Lwhite -s
>> ../Diffusion.bedpostX/merged -m nodif_brain_mask.nii.gz
>>  --seedref=nodif_brain_mask.nii.gz
>>
>>
>>  Thanks for the help!
>>
>>  -Maarten
>>
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