Epochs Creation failed

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MNE version : 1.6.1
Ubuntu : 22.04

I am trying to create ecg based epochs using following lines of code :

self.epochs = mne.preprocessing.create_ecg_epochs(self.raw, ch_name = 'EKG', verbose = False)

There is a channel in raw named “EKG” of type ECG. The above code occasionally throws error for some raw objects (from a large no. of files).

Below is the error :

Traceback (most recent call last):
  File "/home/bala/Desktop/sri_krishna/.HMS/HMS-BrainActivity/Preprocessing/eeg_preprocessing.py", line 165, in <module>
    eeg_processing.create_and_save(eeg_df)
  File "/home/bala/Desktop/sri_krishna/.HMS/HMS-BrainActivity/Preprocessing/eeg_preprocessing.py", line 130, in create_and_save
    self.create_epochs()
  File "/home/bala/Desktop/sri_krishna/.HMS/HMS-BrainActivity/Preprocessing/eeg_preprocessing.py", line 98, in create_epochs
    self.epochs = mne.preprocessing.create_ecg_epochs(self.raw, ch_name = 'EKG', verbose = False)
  File "<decorator-gen-240>", line 10, in create_ecg_epochs
  File "/home/bala/Desktop/BTP/venv/lib/python3.10/site-packages/mne/preprocessing/ecg.py", line 441, in create_ecg_epochs
    ecg_epochs = Epochs(
  File "<decorator-gen-228>", line 12, in __init__
  File "/home/bala/Desktop/BTP/venv/lib/python3.10/site-packages/mne/epochs.py", line 3253, in __init__
    super(Epochs, self).__init__(
  File "<decorator-gen-213>", line 12, in __init__
  File "/home/bala/Desktop/BTP/venv/lib/python3.10/site-packages/mne/epochs.py", line 470, in __init__
    events = _ensure_events(events)
  File "/home/bala/Desktop/BTP/venv/lib/python3.10/site-packages/mne/utils/check.py", line 1199, in _ensure_events
    raise TypeError(err_msg)
TypeError: events should be a NumPy array of integers, got <class 'numpy.ndarray'>

Pls tell ,what could be the reason behind this error for few raw objects when all else raw objects are getting epoched correctly…

Thanks in advance

2

Could you share a raw on which the error is occuring, it looks like a bug.

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