Hi Michel
Have a look at the doc: http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/topup/TopupUsersGuide#A--datain
This is not the bvecs file, it is a text file that contains information about the phase encoding (k-space, not q-space!).
Cheers
Saad
On 26 Sep 2012, at 08:49, Michel Thiebaut de Schotten wrote:
> Dear experts,
>
> This morning I tried to run topup for the first time, to correct distortion on a DWI dataset.
> Following the help menu I wrote the following command
>
> topup --imain=DWI.nii --datain=bvecs
>
> But the following error occurred:
> TopupFileIO:: msg=TopupDatafileReader:: error reading file bvecs
> What is supposed to be the --datain if not the Bvec?
>
> Thanks for your help an the new release of FSL,
> Kind regards,
>
> Michel
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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