It looks like you installed the Ubuntu 22 freesurfer 7.4.1 package, i.e., freesurfer_ubuntu20-7.4.1_amd64.deb. Please list what linux OS you are running, the amount of memory/RAM on your machine, what the processor is on your linux machine and whether or not you are running linux in a virtual machine, e.g., on windows. The processor on your machine may not be able to run all the instructions.

- R.

On Mar 3, 2025, at 09:10, Paola Di Filippo <paola.difilippo@unifg.it> wrote:

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Hi everyone,
I am using freesurfer v. 7.4.1 on a VM and I am trying to run samseg for an MS patient with the following command, but I get the following error: illegal instruction - core dumped.

-------- freesurfer-linux-ubuntu22_x86_64-7.4.1-20230614-7eb8460 --------
Setting up environment for FreeSurfer/FS-FAST (and FSL)
FREESURFER_HOME /usr/local/freesurfer/7.4.1
FSFAST_HOME /usr/local/freesurfer/7.4.1/fsfast
FSF_OUTPUT_FORMAT nii.gz
SUBJECTS_DIR /usr/local/freesurfer/7.4.1/subjects
MNI_DIR /usr/local/freesurfer/7.4.1/mni
paolasofia@Freesurfer-ub22:~$ run_samseg --input /home/paolasofia/DICOM.ANG.CHER.2.4.91/NIFTI/A.C.2.4.91.MRI.12.9.22.T1.nii /home/paolasofia/DICOM.ANG.CHER.2.4.91/NIFTI/A.C.2.4.91.MRI.12.9.22.FLAIR_reg.nii --pallidum-separate --lesion --lesion-mask-pattern 0 1 --output /home/paolasofia/LESION.SEG/A.C.2.4.91.MRI.2.9.22.LESIONS/
Illegal instruction (core dumped)

any ideas on how I could solve the problem?
thanks in advance

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