Question about compensation grade

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Hi experts,

I meet a problem when using MNE v0.16. Could you give me any suggestions? Thank you so much!

The compensation grade of my MEG data is 3 (from CTF).

When I run this command :

filters = make_lcmv <http://martinos.org/mne/stable/generated/mne.beamformer.make_lcmv.html#mne.beamformer.make_lcmv>(evoked.info, forward, data_cov, reg=0.01,noise_cov=noise_cov, pick_ori=pick_ori, weight_norm='unit-noise-gain?)

It said: Compensation grade 3 has been applied, but compensation channels are missing. But I have checked the evoked.info['ch_names?] and it did contain the compensation channels.

I am wondering how to deal with it , as it didn?t happen in v0.14 or earlier.

Thank you so much!

Best,

Daisy
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hi Daisy,

it was recently enforced that comp channels are present to apply
compensation to the forward
operator. It was mistake not to enforce this in the first place.

can you check if it's fixed using current master version and if not open an
issue at https://github.com/mne-tools/mne-python/issues

thanks
Alex