[Freesurfer] surfreg cannot allocate memory

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Hello FreeSurfer Developers,

I am using surfreg to map one of my subject "subj001" to "fsaverage_sym" by these commands:

surfreg --s subj001 --t fsaverage_sym --lh surfreg --s subj001 --t fsaverage_sym --lh --xhemi

The first command worked well, however the second did not. It showed error:

"znzTAGskip: tag=1952870258, failed to calloc 1768846336 bytes! Cannot allocate memory"

Searched the archive but without good luck. Any suggestions? Appreciated!

1) FreeSurfer version: freesurfer-Linux-centos6_x86_ 64-stable-pub-v6.0.0-2beb96c. 2) Platform: UBUNTU 16.04 LTS with 23.5GB memory and 1.4TB available space. (With this, 1.7G should be fine.) 3) uname -a: Linux haoranPC 4.15.0-43-generic #46~16.04.1-Ubuntu SMP Fri Dec 7 13:31:08 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Regards, Haoran Xu