[Mne_analysis] mne_setup_forward_model problem

[Eliezer Kanal]

Hello folks -

I'm a fairly new user to MNE, and I'm having a problem creating the  
BEM. So far, I've succesfully:
* averaged and examined the MEG data using mne_browse_raw
* processed the MRI data using freesurfer
* run mne_watershed_bem

The mne_watershed_bem placed a bunch of files in $SUBJECT_DIR/bem/ 
watershed/, including a file called  
"<subject>_inner_skull_surface" (<subject> is my subject). Guided by  
the MNE manual (sections 3.6-7 and appendix A.1), I made placed an  
alias of that file in the $SUBJECT_DIR/bem/ directory and renamed it  
"inner_skull.surf".

My problem is that when I run mne_setup_forward_model, I get the  
following output (I replaced all instances of the subject name with  
<subject>):

~~~~~~~
$ mne_setup_forward_model --homog --subject <subject> --surf --ico 4

Setting up the BEM with the following parameters:

SUBJECTS_DIR       = /Users/eliezerk/Public/freesurfer_data
Subject            = <subject>
Bad magic in /Users/eliezerk/Public/freesurfer_data/<subject>/bem/ 
inner_skull.surf
Inner skull        = /Users/eliezerk/Public/freesurfer_data/<subject>/ 
bem/inner_skull.surf ( triangles)
brain conductivity = 0.3 S/m
Resulting BEM      = /Users/eliezerk/Public/freesurfer_data/<subject>/ 
bem/<subject>--bem.fif

 >> 1. Creating the BEM geometry file...

mne_surf2bem version 1.4 compiled at Apr  5 2007 16:07:16

input  file #   1 : /Users/eliezerk/Public/freesurfer_data/<subject>/ 
bem/inner_skull.surf / id = 1 / sigma = 0.3 S/m
output file       : /Users/eliezerk/Public/freesurfer_data/<subject>/ 
bem/<subject>--bem.fif

Bad magic in /Users/eliezerk/Public/freesurfer_data/<subject>/bem/ 
inner_skull.surf
Could't create the geometry file
~~~~~~~~

Am I using the wrong file? If so, how do I generate the  
inner_skull.surf file? If not, what should I do? Thanks -

Eliezer Kanal
Graduate Student, Bioengineering
Center for Clinical Neurophysiology
University of Pittsburgh