[Eeglablist] Wrong Channel Structure Size, Changes Ignored

[Chris Heffner]

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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