[Mne_analysis] problem in _check_reference // inverse module

[pascarel at dima.unige.it]

Dear MNE users,

I want to perform source reconstruction on MEG data and
I have this error

*** ValueError: EEG average reference is mandatory for inverse  
modeling, use set_eeg_reference method. ***


Looking at the code, I think the problem is in the _check_reference function
of inverse.py module. This function calls _needs_eeg_average_ref_proj that
picks the eeg channels.

In my data eeg_sel contains 'ECG', 'VEOG', 'HEOG', thus

(len(eeg_sel) > 0


This implies that I need to set a reference, but since the average
reference throws an exception I got another error

*** ValueError: Custom EEG reference is not allowed for inverse modeling.***


I think the problem is that these channels have not to be assumed as  
eeg channels.


Best,
Annalisa


-- 
Dott. Annalisa Pascarella
Istituto per le Applicazioni del Calcolo "M. Picone"
Consiglio Nazionale delle Ricerche
Via dei Taurini 19, 00185 Roma (Italy)
Ph.:+39-0649270946; Fax:+39-064404306