I am trying to run the LGI algorithm on 32 brains. As shown in the archives, I set the environment (on tcsh) and provided the MATLAB pathway.

[afrancis-mac:~] afrancis% setenv MATLABPATH /Applications/MATLAB_R2015a.app/
[afrancis-mac:~] afrancis% setenv PATH ${MATLABPATH}/bin:${PATH}

I also do have the Image processing toolbox. I got the following error:

    Current: /Applications/freesurfer
    Previous: /cm/shared/freesurfer
/Applications/freesurfer/subjects/DM99/surf
#--------------------------------------------
#@# Local Gyrification Index lh Wed Aug 31 13:37:51 EDT 2016
\n mris_compute_lgi --i lh.pial \n
=================
rm -Rf /Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial
=================
=================
mkdir -p /Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial
=================
=================
mris_fill -c -r 1 lh.pial /Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial/lh.pial.filled.mgz
=================
reading surface from lh.pial...
writing filled volume to /Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial/lh.pial.filled.mgz...
conforming output volume
setting resolution for intermediate calculations to 1.0000
=================
make_outer_surface('/Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial/lh.pial.filled.mgz',15,'/Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial/lh.pial-outer'); exit
=================

                            < M A T L A B (R) >
                  Copyright 1984-2015 The MathWorks, Inc.
                   R2015a (8.5.0.197613) 64-bit (maci64)
                             February 12, 2015

 
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For product information, visit www.mathworks.com.
 

    Academic License

>> reading filled volume...
closing volume...
Undefined function 'fspecial' for input arguments of type 'char'.

Error in make_outer_surface (line 31)
Gaussian = fspecial('gaussian',[2 2],1);
 
>>
ERROR: make_outer_surface did not create output file '/Applications/freesurfer/subjects/DM99/surf/tmp-mris_compute_lgi-lh.pial/lh.pial-outer'!
Darwin afrancis-mac.mclean.harvard.edu 14.5.0 Darwin Kernel Version 14.5.0: Thu Jun 16 19:58:21 PDT 2016; root:xnu-2782.50.4~1/RELEASE_X86_64 x86_64

recon-all -s DM99 exited with ERRORS at Wed Aug 31 13:38:36 EDT 2016

For more details, see the log file /Applications/freesurfer/subjects/DM99/scripts/recon-all.log
To report a problem, see http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting