Hi,

Strangely, FIRST ('run_first_all') does not generate the output files (both *_all_fast_firstseg.nii and *_all_fast_origsegs.nii) of a few MRIs (5/92 MRIs).
I believe this is due to the fact that FIRST failed to generate *_BrStem.* files of those 5 MRIs (this is why it can't run fslmerge in the 'run_first_all' script).

Buyean