[Eeglablist] LIMO: Two samples t-test from GUI - "Error using fullfile (line 103), All inputs must be strings, character vectors, or cell arrays of character vectors"

[Elisabetta Pisanu]

Hello everyone,
I tried to run a two samples t-test, selecting 2 groups, beta files,
parameter 1 (I have 3 parameters within subjects but I need to run the
t-test only on the first one).
I use LIMO 3.3 along with EEGLAB 2021. The study I created has 3 parameters
(3 conditions) within subjects and 3 groups. I need to run two samples
t-test to compare each group with the other.
However, it only seems to work via script as from the GUI I get the
following error:

Error using fullfile (line 103)
All inputs must be strings, character vectors, or cell arrays of character
vectors.

Error in limo_random_select (line 519)
                sub_LIMO =
load(cell2mat(fullfile(LIMO.data.data_dir{gp}(sub),'LIMO.mat')));

Error in limo_random_effect>Two_Samples_t_test_Callback (line 202)
    limo_random_select('two-samples

t-test',handles.chan_file,'nboot',handles.b,'tfce',handles.tfce,'type','Channels');

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in limo_random_effect (line 29)
    gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)limo_random_effect('Two_Samples_t_test_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

When I run the following code, it seems to work:
chanlocs = '/XXX/RME_ASD/LIMO/limo_gp_level_chanlocs.mat';
Files{1} =
'/XXX/RME_ASD/LIMO/derivatives/LIMO_RME-ASD_3GP/Beta_files_Gp-ASD_RME-ASD_3GP_RME-ASD_3GP.design1_GLM_Channels_Time_OLS.txt';
%first group
Files{2} =
'/XXX/RME_ASD/LIMO/derivatives/LIMO_RME-ASD_3GP/Beta_files_Gp-LA_RME-ASD_3GP_RME-ASD_3GP.design1_GLM_Channels_Time_OLS.txt';
%second group
LIMOPath = limo_random_select('two-samples
t-test',chanlocs,'LIMOfiles',Files,...
   'analysis_type','Full scalp analysis',
'type','Channels','parameter',[1;1],'nboot',1000,'tfce',0);

Can someone help me? I would like to know what is going on, also to be sure
about the results from the code...
Thanks in advance,
Elisabetta