I'm running Freesurfer's longitudinal pipeline and several of the participants generate the same error for the mri_robust_template step:

cmd: mri_robust_template --mov sub-ECTRO103-V1/mri/norm.mgz sub-ECTRO103-V2/mri/norm.mgz /sub-ECTRO103-V3/mri/norm.mgz sub-ECTRO103-V4/mri/norm.mgz --lta sub-ECTRO103/mri/transforms/sub-ECTRO103-V1_to_sub-ECTRO103.lta sub-ECTRO103/mri/transforms/sub-ECTRO103-V2_to_sub-ECTRO103.lta sub-ECTRO103/mri/transforms/sub-ECTRO103-V3_to_sub-ECTRO103.lta sub-ECTRO103/mri/transforms/sub-ECTRO103-V4_to_sub-ECTRO103.lta --template sub-ECTRO103/mri/norm_template.mgz --average 1 --sat 4.685

error: Internal Error for tp 2 -> template

Rotation should not scale ( 1.44353e-05 )

Debug Info:

A = [ ...

0.9994648269692 0.0051381533060 -0.0325665649690

-0.0062826679505 0.9993709272221 -0.0351399801222

0.0323652536320 0.0353254803840 0.9988599205733 ]

R = [ ...

0.9994563704934 0.0051381078439 -0.0325662912834

-0.0062826179162 0.9993626623658 -0.0351396895455

0.0323649840458 0.0353251881385 0.9988516601031 ]

S = [ ...

1.0000084609181 0.0000000029711 -0.0000000043613

0.0000000029711 1.0000082701461 0.0000000000049

-0.0000000043613 0.0000000000049 1.0000082701081 ]

Internal Error: Rotation should not scale.

Looking at the data, I don't see what could be the issue. Does anyone have any thoughts on this? I have attached the recon-all.log of one participant. I can also share the data if you'd like.

Linux tonetti.nmr.mgh.harvard.edu 3.10.0-1062.4.3.el7.x86_64 #1 SMP Wed Nov 13 23:58:53 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux