[Freesurfer] LGI error in make_outer_surface at 31

Hi, Encountering some difficulties with LGI on a RHEL4 box (64bit) with MATLAB v7.6.0.324 (R2008a) installed. Subject was processed under fsv405. Specific error is pasted below:

Any suggestions to correct my error?

Thanks, Jenifer

...

reading filled volume...

closing volume... ??? Undefined function or method 'fspecial' for input arguments of type 'char'.

Error in ==> make_outer_surface at 31 Gaussian = fspecial('gaussian',[2 2],1);

...

ERROR: make_outer_surface did not create output file 'tmp-mris_compute_lgi-lh.pial/lh.pial-outer'! Linux localhost.localdomain 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:29:47 EST 2005 x86_64 x86_64 x86_64 GNU/Linux

recon-all exited with ERRORS at Wed Sep 24 11:51:01 CDT 2008

[jjuranek@localhost jjuranek_fsv405]$