I am using images preprocessed in FSL, and the FSL motion parameter file .par

I keep receiving this error:

Mapping files for session 1...: ...done
Calculating globals...: 1/1...done

Session 1 global statistics - mean: 16621.8157 stdv: 1.0000
Outlier detection: 0 identified outliers
Statistics of movement data:
x y z pitch roll yaw norm
mean 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
stdv 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
max 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Error using cat
Dimensions of matrices being concatenated are not consistent.
Error in art>savefile_Callback_SaveRegressor (line 1353)
R2=cat(2,R1,M{j});
Error in art>art_OpeningFcn (line 517)
savefile_Callback_SaveRegressor(handles);
Error in gui_mainfcn (line 221)
feval(gui_State.gui_OpeningFcn, gui_hFigure, [], guidata(gui_hFigure), varargin{:});
Error in art (line 131)
gui_mainfcn(gui_State, varargin{:});

What am I doing wrong, or how can this be fixed?