[Eeglablist] Problem when importing CNT files: eeg_checkset error

[Stephen Politzer-Ahles]

Hi Joana,

This sounds like the exact same problem I had a year or two ago. See
http://sccn.ucsd.edu/pipermail/eeglablist/2012/004691.html  (unfortunately
I can't find Michael's original message, which has the solution, in the
EEGLAB archives, but you can see it if you scroll down in that message).

Unfortunately, I think the solution we worked out in that message was kind
of a hack-ish workaround rather than a real solution; I think the issue was
a bug having to do with rounding samples or something like that, but I
don't remember anymore, I will check on bugzilla and see if we had any
further correspondence off-list about this issue.

Best,
Steve



Stephen Politzer-Ahles
New York University, Abu Dhabi
Neuroscience of Language Lab
http://www.nyu.edu/projects/politzer-ahles/


On Tue, Nov 26, 2013 at 10:40 PM, Joana Paiva <joanaispaiva at gmail.com>wrote:

> Hi,
>
> I'm having a problem to load some .cnt files (Neuroscan).
> When I try to import .cnt files via EEGlab GUI, I get the following
> warning in Matlab:
>
> ---
> WARNING: The file size on disk does not correspond to the dataset, file
> has been truncated (on Matlab command line)
>
> &
>
> eeg_checkset error: the number of frames does not divide the number of
> columns in the data. Should EEGlab attempt to abort operation?
> ---
>
> Then, I press 'cancel' and I could import the data, but when I scroll
> through data I can't see any signal in several channels. I also notice that
> the EEG struct has some incongruences, because the field 'number of points'
> (EEG.pnts) - 821440 - doesn't match with the field 'size of the data'
> (EEG.data) - [68x58823 single]. I suppose that the problem is related with
> this inconsistence.
>
> I tried to import using the command line (not using the GUI) but it didn't
> resolve the problem. I have already selected  too the data from points
> [1:end-1] (as was proposed on eeglablist), but the results were the same.
>
> I have already imported those files with BrainVision Analyzer and I was
> able to plot and analyze the signals from all the channels. So, I think
> that the data are OK but EEGlab isn't definitely able to import the files.
>
> I don't know what causes this error message and I would be grateful if
> anyone could help me.
>
> *Joana Paiva*
> MSc Student
> Biomedical Engineering
>
> Faculty of Sciences and Technology - University of Coimbra
>
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20131203/f22a84ed/attachment.html>