Hi Stam,
I was actually just in the process of sending you a message that I fixed my error when I saw your reply.
That's interesting that you didn't receive any errors when you used the qboot command on my data.
As for how I fixed the error from my end, I had to increase the maximum spherical harmonic order from 4 to 8. So the corrected qboot command is:
qboot -k data -m nodif_brain_mask -r bvecs -b bvals --lmax=8 --npeaks=3
Because I am not entirely familiar with the exact mechanism behind qboot, I'm unsure as to why this change is crucial.
Anyway, the error is fixed. Thank you for your help!
Stefan
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