[Eeglablist] Wrong Channel Structure Size, Changes Ignored

[Chris Heffner]

Yeah; unless I'm misinterpreting your message (entirely possible), that's
one of the ways I try to get rid of the right mastoid.  Regardless of
whether you try to get rid of it by unchecking the "channel in data array"
box or clicking "Delete chan", it gives the same error ("wrong channel
structure size, changes ignored" --> "pop_savemyerp cannot save an empty
ERP dataset").

Chris


On Wed, Dec 4, 2013 at 3:54 PM, Mikołaj Magnuski
<imponderabilion at gmail.com>wrote:

>
> Hi Chris,
> Could you check through edit --> channel information whether all channels
> that correspond to rows in EEG.data are set as 'in data', while all other
> set as not 'in data'?
> I'm not sure if this is the problem, but it is worth checking.
>  4 gru 2013 20:42 "Chris Heffner" <heffner at umd.edu> napisał(a):
>
>> Hi all,
>>
>> I'm having strange problems with EEGLAB/ERPLAB (I'm not sure which end
>> the problem is in).  Our EEG setup doesn't use a right mastoid.  Usually,
>> when we analyze data, it isn't a problem to either delete the channel or
>> make sure it's not in the channel array.  However, with the current dataset
>> I'm working with, I can't change the number of channels; when I do so, it
>> says "wrong channel structure size, changes ignored".  Thus, when I try to
>> either plot the scalp maps or even topographically arrange the waveforms,
>> the program freaks out and "skipes" all of the channels, delivering an
>> error "pop_savemyerp cannot save an empty ERP dataset".
>>
>> This issue is not specific to the computer I'm running (which, with the
>> exact same setup, has been able to do everything it needs to with other
>> data sets), nor to the channel I'm trying to get rid of.  Actually, if I
>> try to get rid of a channel though "ERP Operations">"ERP Channel
>> Operations", I get a different error, but it still doesn't work.  It's
>> long, but here's how it starts and stops:
>>
>> ---
>>
>>  ERPLAB WARNING: ERPLAB could not generate a command history for this
>> operation.\n
>>
>> Reference to non-existent field 'pushbutton_help'.
>> ...
>> Error in
>>
>> @(hObject,eventdata)chanoperGUI('pushbutton_removechan_Callback',hObject,eventdata,guidata(hObject))
>>
>>
>> Error using waitfor
>> Error while evaluating uicontrol Callback
>>
>> ---
>>
>> Googling around has yielded no results whatsoever.  Any thoughts?
>>  Anything else I can provide to give more information?
>>
>> Thanks,
>>
>> Chris
>>
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