[Freesurfer] mris_sphere error: terminated by signal 9

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Dear FreeSurfer experts,

I'm attempting to use recon-all on my subjects and I have one of my subjects exit with errors after it is terminated by signal 9 during -sphere of autorecon3.

I tried rerunning this particular step with command recon-all -autorecon3 -subjid subj07 -sphere. Unfortunately mris_sphere keeps being terminated. I experience this exact same problem with another one of my other subjects, whereas the rest of my subjects manage to finish recon-all.

I use freesurfer-linux-centos7_x86_64-7.1.0-20200511-813297b on a virtual machine (VirtualBox) on my windows computer. Linux developer-VirtualBox 5.4.0-65-generic #73~18.04.1-Ubuntu SMP Tue Jan 19 09:02:24 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Any thoughts on how to troubleshoot this? Thanks a lot.

Regards,?