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 If your path /software/rocky9/… means you are trying to run a 7.4.1 release on Rocky9 Linux, then I would not expect it to work.  Starting with the 8.0.0 release, there is a Rocky8 installer that I think will also work on Rocky9.   Please see the release page at,https://secure-web.cisco.com/1cdkdm-VjSPKz6eCLzOVZPN9EdLt6weq_jIU-Vi8uL0Noq3... - R. On Apr 8, 2025, at 16:49, Billah, Tashrif <tbillah@bwh.harvard.edu> wrote:Hi all, In freesurfer-7.4.1, the nu_correct command gives this error: ```Can't locate Sys/Hostname.pm in @INC (you may need to install the Sys::Hostname module) (@INC contains: /software/rocky9/freesurfer-7.4.1/mni/share/perl5 /usr/local/lib64/perl5/5.32 /usr/local/share/perl5/5.32 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at /software/rocky9/freesurfer-7.4.1/mni/share/perl5/MNI/MiscUtilities.pm line 36.BEGIN failed--compilation aborted at /software/rocky9/freesurfer-7.4.1/mni/share/perl5/MNI/MiscUtilities.pm line 36.Compilation failed in require at /software/rocky9/freesurfer-7.4.1/mni/share/perl5/MNI/Spawn.pm line 35.BEGIN failed--compilation aborted at /software/rocky9/freesurfer-7.4.1/mni/share/perl5/MNI/Spawn.pm line 35.Compilation failed in require at /software/rocky9/freesurfer-7.4.1/mni/bin/nu_correct line 38.BEGIN failed--compilation aborted at /software/rocky9/freesurfer-7.4.1/mni/bin/nu_correct line 3``` We are in Redhat 9 OS. Is this expected? Could you recommend a solution? Best,Tashrif_______________________________________________Freesurfer mailing listFreesurfer@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer