External Email - Use Caution        

 If you are getting an “illegal instruction” error running Freesurfer on Linux,  then the hardware (CPU’s) do not have those instructions available in their instruction set to execute.   As far as I know that error only happens with Freesurfer binaries compiled with AVX instructions.  So either you are running on new ARM based processors or you are running on older Intel processors (approx. pre-2011) that do not implement AVX.  There is a list of Intel processors supporting AVX instructions at MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://en.wikipedia.org/wiki/Advanced_Vector_Extensions.  For Linux machines, the resolution is to run use Intel processors that can execute those instructions.

- R.


On Sep 12, 2023, at 16:27, Douglas N. Greve <dgreve@mgh.harvard.edu> wrote:

        External Email - Use Caution        


what problem? There is nothing else in your email and I don't have the previous threads.

On 9/12/2023 10:51 AM, Glass, John wrote:

        External Email - Use Caution        

Hello,
 
I am running into the exact same problem at my local site running version 7.4.1 on a centos 7 machine with a build stamp of: freesurfer-linux-centos7_x86_64-7.4.1-20230613-7eb8460.
 
Has this issue been resolved?
 
Thank you,
 
John O. Glass, M.S.
Signal Processing Supervisor
Department of Diagnostic Imaging
St. Jude Children's Research Hospital
262 Danny Thomas Place, Mail Stop 220
Memphis, TN 38105-3678
(901) 595-3276
 


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