Hi
We simultaneously recorded ECG using a Neuromag system.
Before the update, the ECG data could be viewed by right-clicking on the raw file and selecting EEG BAD LOC. In the current version, that link seems to be wrong, and the magnetometer data is displayed.
Could you please confirm?
I'm not sure where channels with type "EEG BAD LOC" would come from, or what their function could be.
When you try to set the EEG electrodes positions with the menu "Add EEG positions", all the channels with the type "EEG" that could not found in the specified 3D positions file or template are switched to "EEG_NO_LOC", in order to be excluded from the forward and inverse modeling computations.
https://neuroimage.usc.edu/brainstorm/Tutorials/Epilepsy#Prepare_the_channel_file
This category should never include MEG sensors.
If they include the ECG, it is because the ECG was classified as type "EEG" instead of type "ECG". I'd recommend you edit your channel file and fix these types before trying to add the digitized 3D positions.
If this doesn't help, please provide some more context to your problem, including screen captures.