[Mne_analysis] BEM Model not configuring correctly

[sheraz at nmr.mgh.harvard.edu]

You are trying to solve the BEM on very high resolution HEAD-surface,
which is not required due to the smoothing of the potentials

mne_setup_forward_model --subject PTC2_12 --surf --ico 5 --overwrite

This will be enough,
mne_setup_forward_model --subject ${subject} --surf --homog --ico 4 
--overwrite



ico-5 you needed is for mne_setup_source_space, which is setting up the
cortical surface where dipole will be placed

mne_setup_source_space --subject ${subject} --ico 5 --cps --overwrite


Hope this helps

Sheraz

> Hey Minimum Norm Estimators,
>
> I ran a subject before using the spacing of 7, but I was told it would
> be a good counter-model to try a spacing of 5. However, when I run: the
> command to set up the BEM model, it gives me this error:
>
>  > Solution ready.
>  > Saving...Could not update directory!
>  >
>  > Saved the result to
> /autofs/space/huygens_001/users/dgow/PTC2/MRI/PTC2_12/bem/PTC2_12-20480-20480-20480-bem-sol.fif
>  >
>  > BEM geometry computations complete.
>  >
>  > The model
> /autofs/space/huygens_001/users/dgow/PTC2/MRI/PTC2_12/bem/PTC2_12-20480-20480-20480-bem-sol.fif
> is now ready for use
>  > Complete.
>
> I am not sure why it could not update the directory. My disk has more
> than 50 GB left, and there is a ...-sol.fif file but it takes 3.7GB of
> space, the spacing 7 file takes only 0.23 GB. The forward solution
> process cannot load the ...-sol.fif file. The BEM/MEGMRI portion of my
> commands look like this:
>
> mne_setup_source_space --overwrite --spacing 5 --subject PTC2_12
> mne_setup_mri --overwrite --subject PTC2_12
> mne_watershed_bem --overwrite --subject PTC2_12
> mne_setup_forward_model --subject PTC2_12 --surf --ico 5 --overwrite
>
> Additionally, the mne_setup_forward_model command takes about 12 hours
> to compute. In the past (with fewer vertices) it has only taken 12
> minutes, so I am not sure what is the slowdown.
>
> Do you know why the mne_setup_forward_model function did not work or why
> it takes so long? Can I provide any additional information?
>
> - Conrad
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