Dear Sungho,
   I met a problem as follows when I performed Spatial processing using sample data (Stroop),but i also can finish this step. When I performed temporal processing,I also met some problems.   My computer is MaC OS 64 bit. Matlab version is R2014b. Thank you very much!
   Xiaoyu


Optode and channel positions in MNI space are identified.

Project MNI coordinates onto the rendered brain...
Warning: Element(s) of class 'file_array' do not match the current
constructor definition. The element(s) have been converted to structures.
> In spm_fnirs_spatialpreproc_ui at 80
In spm_fnirs>push_spatial_Callback at 64
In gui_mainfcn at 95
In spm_fnirs at 25
In @(hObject,eventdata)spm_fnirs('push_spatial_Callback',hObject,eventdata,guidata(hObject))
Completed.
Save POS.mat...
Completed.
fNIRS measurements (NIRS.mat) are paired with channel positions (POS.mat)...
Completed.
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Completed. : 10:39:53 - 25/08/2017
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Apply temporal filters to fNIRS data...
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Read and display time series of fNIRS data...
Specify parameters for temporal preprocessing...
Completed.
Apply a temporal filter to hemoglobin changes...
Warning: Name is nonexistent or not a directory:
/Users/zhuxiaoyu/Desktop/0823fnirs_data/spm12/external/fieldtrip/preproc
> In path at 109
In addpath at 86
In spm_fnirs_preproc at 108
In spm_fnirs_temporalpreproc_ui at 155
In spm_fnirs>push_temporal_Callback at 70
In gui_mainfcn at 95
In spm_fnirs at 25
In @(hObject,eventdata)spm_fnirs('push_temporal_Callback',hObject,eventdata,guidata(hObject))
Undefined function 'ft_preproc_bandstopfilter' for input arguments of type
'double'.
Error in spm_fnirs_preproc (line 119)
Y = ft_preproc_bandstopfilter(Y', P.fs, P.K.C.cutoff(j,:), [],
'fir', fdir)';
Error in spm_fnirs_temporalpreproc_ui (line 155)
[fy, P] = spm_fnirs_preproc(y, P);
Error in spm_fnirs>push_temporal_Callback (line 70)
spm_fnirs_temporalpreproc_ui;
Error in gui_mainfcn (line 95)
feval(varargin{:});
Error in spm_fnirs (line 25)
gui_mainfcn(gui_State, varargin{:});
Error in
@(hObject,eventdata)spm_fnirs('push_temporal_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback