[FieldTrip] [ft_databrowser] error: "left and right sides have a different number of elements"

[Thelma Landron]

Dear fieldtrip community,

I'm Thelma, PhD candidate at ICM, Paris.

I'm working on iEEG data, which I've preprocessed (bandpassed, mainly) and
have had it locked on the stimulus of interest & epoched (24 trials),
successfully so far.
However, when trying to visualise the epoched data using ft_databrowser,
matlab (not fieldtrip) raises an error. Here's how it looks like:

--------
ft_LFP_stimLock_iTask =

struct with fields:

           hdr: [1×1 struct]
         label: {6×1 cell}
          time: {1×24 cell}
         trial: {1×24 cell}
       fsample: 2048
    sampleinfo: [24×2 double]
           cfg: [1×1 struct]

--------

cfg                     = [];
cfg.channel       = 'all';
cfg.continuous   = 'no';
cfg.viewmode    = 'vertical';
cfg.allowoverlap = 'yes';
check_visu = ft_databrowser(cfg, ft_LFP_stimLock_iTask);

the input is raw data with 6 channels and 24 trials detected 0 visual
artifacts
the call to "ft_prepare_layout" took 0 seconds and required the additional
allocation of an estimated 0 MB
Unable to perform assignment because the left and right sides have a
different number of elements.

Error in ft_databrowser>redraw_cb (line 1811)
      eventtim(ievent) = (event(ievent).sample-begsample)/opt.fsample +
opt.hlim(1);

Error in ft_databrowser (line 733)
redraw_cb(h);
--------

I first tried to comment cfg entries one after the other but then resigned
myself to look for a similar bug on Google and the fieldtrip website, in
vain.
When "cfg.continuous  = 'yes';", it first seemed to work, but only for the
1.99 first seconds (~half the epoch length, stimulus locked at t = 2 s) as
the same error was raised when trying to visualise segments after 2 s.
I also cleared sampleinfo from the data structure ("clear
ft_LFP_stimLock_iTask.sampleinfo"), as suggested in one previous
ft_databrowser bug request but matlab keeps raising the same error.

Would any of you have an idea of how to fix this?

Many thanks,
-- 
*Thelma Landron*

   - PhD candidate,
   Motivation Brain and Behavior (MBB
   <https://sites.google.com/site/motivationbrainbehavior/>) team,
   Institut du Cerveau et de la Moelle épinière (ICM
   <https://icm-institute.org/en/>), Sorbonne Université, Paris
   - Medical student, Université de Paris - Paris Descartes, Paris
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