[Freesurfer] Fs-FAST preprocessing error

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Hello Freesurfer Developers,

I am currently running the fs-FAST preprocessing command, and this is a frequent error that I keep running into across various datasets of ours.

DOF = 0

I have searched the listserv in order to find any possible solutions for my query, but to no avail. Another curious issue that comes up is when I re-run the preproc-sess command after the above error, it proceeds without issue and completes the process, which has further confused me as to what the possible issue could be.

Attached is the terminal session output for you to take a look at.

Thank you so much for all your help!

Best, Hibah