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Dear Freesurfer experts,

I'm trying to download runtime for ubuntu using the instructions on the website and I'm struggling to resolve this error (seen below). Any ideas on how to fix this? Thank you and hope everyone is safe! 

cd $FREESURFER_HOME/bin && curl https://raw.githubusercontent.com/freesurfer/freesurfer/dev/scripts/fs_install_mcr -o fs_install_mcr && chmod +x fs_install_mcr
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0Warning: Failed to create the file fs_install_mcr: Permission denied
 68  1988   68  1371    0     0   4436      0 --:--:-- --:--:-- --:--:--  4422
curl: (23) Failed writing body (0 != 1371)
alex@ubu19:/usr/local/freesurfer/bin$ fs_install_mcr R2012b
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   177  100   177    0     0     77      0  0:00:02  0:00:02 --:--:--    77
Archive:  installer.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of installer.zip or
        installer.zip.zip, and cannot find installer.zip.ZIP, period.

Thank you, 
Alex Job Said