Dropping bad epochs

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Hi,

I am using the Epochs function to create a set of epochs. I have made sure I don?t make use of any of the reject options as I would like to read in all epochs and then run my own preprocessing function to select bad epochs (see example code below: currently I am using version 15). Yet, it seems in almost all my data sets one epoch is automatically dropped as it is marked as bad. While this is not the biggest problem in the world, I was wondering why this happens. In other words how could I make sure all epochs are actually created without droppig any of them??

Thanks in advance,

Dirk

Epochs(raw, events, event_id, tmin, tmax, flt_pad=True, baseline=(None, None), picks=None, preload=True,
                 reject=None, flat=None, proj=False, decim=1, reject_tmin=None, reject_tmax=None, detrend=None,
                 on_missing='error', reject_by_annotation=False, verbose=None)