[Mne_analysis] importing epoched data without events

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Hi all,
I have continuous eeg data that contain one event.
I did two different epoching for the same event to my EEG data in
EEGLAB. Now after the epoching I got two epoched sets with the same
epochs number but different size for each epoch.
One set contains the event. The other one doesn't contain the event
(because I chose the range of the epoching to be out of the event).
When trying to import the data with mne.io.read_epochs_eeglab(filename)
It imports correctly for the data with events but when trying to
import with the data without events then I get the following error
message:
index 0 is out of bounds for axis 0 with size 0

How to solve this? Many many thanks for any help.