Having trouble reading .mff file

Support & Discussions
1
  • MNE version: e.g. 1.9.0
  • operating system: macOS 15.2

I am trying to read the resting EEG data collected from EGI system. It has the format in .mff. So I used “raw_eeg = mne.io.read_raw_egi(file_path)” but then I got the error “Number of defined channels (129) did not match the expected channels (3)”.

How should I fix this and read the data in python?

Thank you so much for any help!

2

Can you try reading your MFF file with the mffpy package and let us know if it reads the file without an error? If mffpy also errors out, then it might mean that your file is corrupt. if mffpy doesn’t return an error, then maybe there is a bug in the MNE-Python reader.