[Eeglablist] trouble with importing EGI .mff files

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Sun Oct 8 11:23:39 PDT 2017

Hello Heather,

The .mff import plugin in eeglab may not be updated or fully functional to
deal with all kinds of files.

One can easily export your processed files (including epoched, etc) into
.raw files and use the older non-mff Netstation import functions in eeglab.

There are also other options which require a bit more work, such as
exporting to matlab or text formats, and then importing by hand into
matlab/eeglab using existing other import functions, or your own
within-matlab methods.

Alternatively, ask EGI support for an updated mff importer, or some version
of it that loads files directly into matlab, and then one could likely
easily connect the imported data into an eeglab EEG structure.

Overall this may be a bug on the mff importer side or the way that eeglab
talks importer. If replicable, consider putting it into the eeglab bugzilla
as a bug and/or feature request.

If one is matlab savvy, then one can look through the getEpochsInfos
function code, and you might be able to tweak it to hack through for now,
but I would not trust such a method unless you are really 100% sure of what
one is doing.

On Wed, Oct 4, 2017 at 3:47 PM, Heather Soder <soderh at mail.usf.edu> wrote:

> Hi all,
> Is it possible to import EGI .mff files (using .mff import extension) into
> EEGLab that have already gone through some preprocessing? I can import a
> file that has been filtered in Netstation into EEGLAB, but I cannot import
> any files that have been epoched in Netstation. Specifically I am getting
> the following error when I try to import an epoched .mff file.
> EEGLAB error in function getEpochInfos() at line 121:
> Undefined function or variable "totalNumSegs".
> Thanks for the help!
> Heather
> --
> Heather Soder, MA
> Doctoral Candidate
> University of South Florida
> Cognitive Neuroscience Psychology Program
> Cognitive Electrophysiology and Clinical Neuroscience Lab
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