Unrecognized function or variable 'fileparts'

Hi, i tried to use the fileparts() function in this code :

function [b] = initialize_vars(subject,group, intervention)

% SPM info

%--------------------------------------------------------------------------

%b.spmDir = fileparts(which('spm')); % path to SPM installation

b.spmDir = fileparts('/Applications/MATLAB_R2021b.app/toolbox/spm12/spm.m'); % path to SPM installation

But i got this error :

Unrecognized function or variable 'fileparts'.

Error in initialize_vars (line 15)

b.spmDir = fileparts('/Applications/MATLAB_R2021b.app/toolbox/spm12/spm.m'); % path to SPM installation

Error in main_Preproc1st_Mind2_NF2 (line 86)

b = initialize_vars(groups{g}{i}, groups{g}{end}, interv{i_int});

[Rik]

There seems to be something very wrong with your installation. Did you try restarting it? These are internal errors. The fileparts function is a core function, so if it is missing, something is seriously harming the normal operation of Matlab.

I once had a function called 'settings' in my working directory. That blocked access to vital parts of Matlab, including the editor. Such things could also cause strange errors like this.

[Walter Roberson]

Experiment with

restoredefaultpath; rehash toolboxcache