Error during first-level analysis

Hi all

started getting an error message today, that I haven't seen before. First-level analysis gets stuck because of it. Any idea how to proceed?

Thanks

E.

ERROR DESCRIPTION:

Error using matlab.graphics.primitive.Patch/set
While setting property 'FaceColor' of class 'Patch':
Color value contains NaN, or element out of range 0.0 <= value <= 1.0
Error in conn_timedwaitbar (line 58)
set(findobj(b,'tag','patch'),'facecolor',(1-a)*[5/6,2/6,1.5/6]+a*[1.5/6,5/6,2/6]);
Error in conn_process>conn_waitbar (line 4417)
else h=conn_timedwaitbar(varargin{:}); end
Error in conn_process (line 3581)
conn_waitbar(n/N,h,sprintf('Subject %d Condition %d',nsub,ncondition));
Error in conn_process (line 38)
case 'analyses_gui_seed',disp(['CONN: RUNNING ANALYSIS STEP (ROI-to-ROI or seed-to-voxel analyses)']); conn_process([10,11,15],CONN_x.Analysis);
Error in conn (line 4529)
else conn_process('analyses_gui_seed',CONN_x.Analysis);
Error in conn_menumanager (line 119)
feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end});
CONN v.16.b
SPM12 + DEM FieldMap MEEGtools suit
Matlab v.2016b
storage: 586.5Gb available