Important Note: When processing a group of subjects for your study, it is essential to process all your subjects with the same version of FreeSurfer, on the same OS platform and vendor, and for safety, even the same version of the OS. While we continue to work to ensure that results match across platforms, there are none-the-less system-level libraries that are OS dependent. An exception to this rule is that you may view and edit files across any platform or version, and run some post-processing tools (outside the recon-all stream) if you check with us first (for instance you may run the longitudinal processing with newer versions).

So I suspect the answer is it depends upon what you are running and, e.g., how statistics are subsequently computed using the (floating point) output. Running on a different OS with a different release of Freesurfer means floating point results will not be identical to the output produced with your previous systems and (older) FS releases at some position to the r.h.s of the decimal point.

- R.

On Oct 18, 2022, at 11:22, Alexopoulos, Dimitrios <dimitriosalexopoulos@wustl.edu> wrote:

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We’ve made system software upgrades recently and of some our data was run using the FS 7.2.0 CentOS 7 build but on Ubuntu 18.04 servers.

The outputs look good and there no output errors. Should these data be rerun?

Jim

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