[Mne_analysis] mne make_scalp_surfaces error

[Alexandre Gramfort]

hi,

your version of mne_surf2bem is too old.

please try to install the latest version of mne C. Take the nightly build.
The --force option was introduced much later than 2009.

now I think we should fix this as mne_surf2bem should not be necessary
for this operation.

I opened an issue on github

https://github.com/mne-tools/mne-python/issues/3709

HTH
Alex


On Fri, Oct 28, 2016 at 1:09 AM, Leonardo Barbosa <lsbarbosa at gmail.com> wrote:
> Dear list,
>
> Since I changed to the the develop version (0.14.dev0), I've been seeing a
> warning message whenever I try to do the co-registration using
> mne.gui.coregistration:
>
> ------
>
> No high resolution head model was found for subject USER_2005_T1, using
> standard head instead. In order to generate a high resolution head model,
> run:
>
>
> $ mne make_scalp_surfaces -s USER_2005_T1
>
>
> ------
>
> https://drive.google.com/open?id=0B0p7WZ2wlTFSTjZQSGNMOHpCTGc
>
> So far, following the Head Model tutorial, I've been using
>
> mne watershed_bem -s USER
> (output: https://drive.google.com/open?id=0B0p7WZ2wlTFSODIzekhIQ2tuNnM)
>
> which generates the head surface .fif file in :
>
> bem/USER_2005_T1-head.fif (together with some other surface files)
>
> and did not have any further problems.
>
> Following the warning, I tried to run the
>
> mne make_scalp_surfaces -s USER_2005_T1
>
> and even though the high-resolution was created in
>
> bem/NCCAM_2005_T1-head-dense.fif (together with the surf/*seghead* files)
>
> I got the following error in the part that generates the medium tessellation
> (output here :
> https://drive.google.com/open?id=0B0p7WZ2wlTFSZHp0VVpBUWxNbXc).
>
> Therefore my question is: can I safely ignore the warning and use the lower
> resolution bem generated by the watershed algorithm?
> What would be the advantages of using the high-resolution version?
>
> One clear advantage for me it to use the high resolution when possible to
> mark the fiducials, but I figure that for the actual forward model a lower
> resolution must be used otherwise it would take long to compute all
> electrical distances, no?
>
> Of note:
>
> * The same error occurs when I use the version 0.13-dev and 0.13 stable.
> * I'm using
>
> mne_surf2bem version 1.6 compiled at Dec 21 2009 19:47:09
>
> * I noticed that mne_surf2bem complains about a --force option, which
> apparently do not exist.
> If I try to remove the offending argument, I get a different error (output
> here: https://drive.google.com/open?id=0B0p7WZ2wlTFSbHdTWkpub2N2T3c)
>
> Any help is appreciated!
>
> Thank you,
> Leonardo Barbosa
>
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