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Dear,

I'm attempting to execute the recon-all command on the recently released FS 8.1.0 version, however I get an error that I was not getting in prior versions (6.0 and 7.4.1).

Command: *recon-all -subjid FREESURFER -sd "/OUTPUT" -i "/INPUT/DATA input_t1/003MSVISMPRAGE_02.nii.gz" -all *

Output Log: Adding options -fix-ento-wm -transfer-base-bfs -fix-vsinus -fix-mca-dura -fix-ga -fix-acj -synthstrip -synthseg -synthmorph fs-check-version --s FREESURFER --o /tmp/tmp.HYwr24 Thu Jul 24 09:29:43 AM UTC 2025

setenv SUBJECTS_DIR /OUTPUT /usr/local/freesurfer/8.1.0/bin/fs-check-version --s FREESURFER --o /tmp/tmp.HYwr24 -rwxr-xr-x 1 root root 18565 Jul 19 00:36 /usr/local/freesurfer/8.1.0/bin/fs-check-version

freesurfer-linux-ubuntu22_x86_64-8.1.0-20250719-f30dfed $Id$ Linux 83857eca32d0 6.8.0-1021-gcp #23~22.04.1-Ubuntu SMP Thu Jan 16 02:17:57 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux pid 126 Current FS Version freesurfer-linux-ubuntu22_x86_64-8.1.0-20250719-f30dfed Subject does not have a bstampfile, copying /usr/local/freesurfer/8.1.0/build-stamp.txt Subject FS Version: freesurfer-linux-ubuntu22_x86_64-8.1.0-20250719-f30dfed No constraints on version because REQ=UnSet and FsVerFile=NotThere #@#% fs-check-version match = 1 fs-check-version Done INFO: SUBJECTS_DIR is /OUTPUT Actual FREESURFER_HOME /usr/local/freesurfer/8.1.0 Linux 83857eca32d0 6.8.0-1021-gcp #23~22.04.1-Ubuntu SMP Thu Jan 16 02:17:57 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux /OUTPUT/FREESURFER

mri_convert /INPUT/DATA/input_t1/003MSVISMPRAGE_02.nii.gz /OUTPUT/FREESURFER/mri/orig/001.mgz

mri_convert /INPUT/DATA/input_t1/003MSVISMPRAGE_02.nii.gz /OUTPUT/FREESURFER/mri/orig/001.mgz INFO: using NIfTI-1 sform (sform_code=1) reading from /INPUT/DATA/input_t1/003MSVISMPRAGE_02.nii.gz... TR=1970.00, TE=0.00, TI=0.00, flip angle=0.00 i_ras = (0.0348693, -0.999392, 0) j_ras = (-0.0330512, -0.00115315, 0.999453) k_ras = (0.998845, 0.0348502, 0.0330713) writing to /OUTPUT/FREESURFER/mri/orig/001.mgz... #--------------------------------------------

*#@# MotionCor Thu Jul 24 09:29:52 AM UTC 2025Found 1 runs/OUTPUT/FREESURFER/mri/orig/001.mgzChecking for (invalid) multi-frame inputs.../usr/local/freesurfer/8.1.0/bin/UpdateNeeded: line 14: syntax error near unexpected token `('/usr/local/freesurfer/8.1.0/bin/UpdateNeeded: line 14: `set Sources = ($argv);'if: Expression Syntax.*

More info: 1) FreeSurfer version: *freesurfer-linux-ubuntu22_x86_64-8.1.0-20250719-f30dfed* 2) Platform: Distributor ID: Ubuntu Description: *Ubuntu 22.04.5 LTS* Release: 22.04 Codename: jammy

3) uname -a: *Linux eec78b7407cc 6.8.0-60-generic #63~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Apr 22 19:00:15 UTC 2 x86_64 x86_64 x86_64 GNU/Linu*

Note, I have the 6.0 and the 7.4.1 on the same environment and executed their recon-all on the same data and they do work.

Best