Hi Alfonso and CONN community, 
I cannot find similar threats and completely stuck with MVPA. I am getting the following error persistently and do not know how to sort it out. 
I would greatly appreciate your help/suggestions

thank you in advance, 
alla 

Analysis: First-level, MVPA, all defaults

Error using svd
SVD did not converge.

Error in conn_process (line 2822)
[Q,D]=svd(c1);
Error in conn_process (line 43)
case 'analyses_gui_vv', disp(['CONN: RUNNING ANALYSIS STEP (voxel-to-voxel analyses)']); conn_process([13],varargin{:});
Error in conn (line 6587)
else conn_process('analyses_gui_vv',CONN_x.vvAnalysis); ispending=false;
Error in conn_menumanager (line 120)
feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end});
CONN v.18.a
SPM12 + DEM FieldMap MEEGtools
Matlab v.2018a
storage: 484.9Gb available
spm @ /Volumes/Alla-Work/CURRENT_ANALYSIS/spm12
conn @ /Volumes/Alla-Work/CURRENT_ANALYSIS/conn/conn