Hi Alfonso,
I am getting an error message at the end of "first-level Analysis" processing step.
ERROR DESCRIPTION:

Error using ==> conn_process at 2734
Non-existing ROI first-level data for scrubbing_Dim30 subject 2. Please repeat first-level analyses
Error in ==> conn_process at 25
case 'analyses_gui_seed',disp(['CONN: RUNNING ANALYSIS STEP (ROI-to-ROI or seed-to-voxel analyses)']); conn_process([10:12,15],CONN_x.Analysis);
Error in ==> conn at 3086
conn_process('analyses_gui_seed',CONN_x.Analysis);
Error in ==> conn_menumanager at 102
feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end});
CONN v.14.n
SPM8 + ArtRepair Beamforming DEM FieldMap MEEGtools
Matlab v.2011a

My data are co-registered and normalized in SPM separately. The error comes when I add "scrubbing" step in Preprocessing. If I remove "scrubbing" covariate and leave just motion covariate, the analysis goes to the end. Please help.
Thanks, Alex