Hi Noam, these seem to be corrupted in a way that makes it so only freesurfer 5 can read them. If you source 5.3 and 'resave' the vols with mri_convert, like:

mri_convert aseg.mgz aseg.mgz

That should fix whatever the problem is and allow you to load them in v6+

best Andrew

________________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Peled, Noam NPELED@mgh.harvard.edu Sent: Thursday, October 17, 2019 3:32 PM To: Freesurfer support list Subject: [Freesurfer] mri_pretess: Cannot allocate memory

Dear group, When trying to run mri_pretess, I'm getting this error: znzTAGskip: tag=809120822, failed to calloc 1802706944 bytes!

Cannot allocate memory

Here is the full command I'm using (in the Martinos center, using ver6 stable):

mri_pretess /autofs/space/thibault_001/users/npeled/subjects/mg27/mri/aseg.mgz 54 /autofs/space/thibault_001/users/npeled/subjects/mg27/mri/norm.mgz /autofs/space/thibault_001/users/npeled/subjects/mg27/tmp/274f23/54_filled.mgz

Thanks! Noam