[Mne_analysis] issue when computing PSDs with eLORETA

[Fleur GAUDFERNAU]

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Dear MNE community,


When trying to compute psd over epochs (with mne.minimum_norm.compute_source_psd_epochs) using eLORETA method, I have the following error :

psd *= noise_norm ** 2
TypeError: unsupported operand type(s) for ** or pow(): 'NoneType' and 'int'

Coming from that line:

https://github.com/mne-tools/mne-python/blob/361fa5fde83c192f705b9a0dd792858237c4b0b1/mne/minimum_norm/time_frequency.py#L676

I believe this is because noise_norm is set to None for MNE and eLORETA methods in:
https://github.com/mne-tools/mne-python/blob/1639ab47dd41a73e9e95962e766c80c102cc70f1/mne/minimum_norm/inverse.py#L673
Does anyone has the same issue?
Thanks in advance.
Fleur
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