Nice to see that you've been searching the archives for solutions. Maybe try the following in MATLAB: which spm_defaults and also try the following to see if it contains the line "defaults.preproc.fudge = 5;": type spm_defaults.m Best regards, -John On 15 July 2011 14:47, Michael Dimyan <[log in to unmask]> wrote: > Trying to run Segment in SPM8 via the gui. Even after accepting all defaults, still receiving this error: > > ---------------------------- > Running 'Segment' > Failed 'Segment' > Reference to non-existent field 'fudge'. > In file "/usr/local/spm8/spm_preproc.m" (v4178), function "spm_preproc" at line 105. > In file "/usr/local/spm8/config/spm_run_preproc.m" (v4185), function "spm_run_preproc" at line 19. > > The following modules did not run: > Failed: Segment > --------------------------- > > Have checked and there are no other spm_default.m files in my path. spm_update says that spm is up to date. > > Thanks! >