Dear AFNIs,
Hi,
I plan to use Human connectome data, which provides both in volumetric and surface (grayordinate) timeseries files. Both files have .nii suffix.
When I use afni codes such as 3dFourier as follows, I receive following error for the surface data:

3dFourier -lowpass .08 -retrend -prefix test.nii rfMRI_REST2_RL_Atlas_hp2000_clean.dtseries.nii

++ 3dFourier: AFNI version=AFNI_2011_12_21_1014 (Jan 8 2014) [64-bit]
** ERROR: nifti_convert_nhdr2nim: bad datatype
** ERROR (nifti_image_read): cannot create nifti image from header 'rfMRI_REST2_RL_Atlas_hp2000_clean.dtseries.nii'
** FATAL ERROR: Can't open dataset 'rfMRI_REST2_RL_Atlas_hp2000_clean.dtseries.nii'
** Program compile date = Jan 8 2014

(I run it in the same directory as data, so I am sure it should be able to open the data, but it seems it cannot understand it is nifti(or it is not nifti though it has .nii suffix?)

And for the volumetric data , it seems it starts working but after a while it stops and just says

dFourier -lowpass .08 -retrend -prefix test.nii rfMRI_REST1_RL_hp2000_clean.nii
++ 3dFourier: AFNI version=AFNI_2011_12_21_1014 (Jan 8 2014) [64-bit]
Killed

though I do not stop it!

Would you please let me know how to fix above problems or if some steps should be applied to HCP data to make it ready for AFNI/SUMA?

Thanks in advance,
Mahshid