error information for 2-sample t test_Undefined function 'y_regress_ss' for input arguments of type

Submitted by zuolonglotu@gm… on
Dear Prof. Yan,
When I did 2-sample t test using dpabi, the information showed as follow:
 Regression Calculating...
.......Undefined function 'y_regress_ss' for input arguments of type
'double'.
 
Error in y_GroupAnalysis_Image (line 95)
                    [b,r,SSE,SSR, T, TF_ForContrast] =
                    y_regress_ss(DependentVariable,[Predictor,CovVariable],Contrast,TF_Flag);
                    
Error in y_TTest2_Image (line 79)
[b_OLS_brain, t_OLS_brain, TTest2_T, r_OLS_brain, Header] =
y_GroupAnalysis_Image(DependentVolume,Regressors,OutputName,MaskFile,CovariateVolume,Contrast,'T',0,Header);
 
Error in DPABI_STAT_TOOL>ComputeButton_Callback (line 498)
        y_TTest2_Image(S, OutputName, MaskFile, ImageCell, TextCell);
 
Error in gui_mainfcn (line 96)
        feval(varargin{:});
 
Error in DPABI_STAT_TOOL (line 42)
    gui_mainfcn(gui_State, varargin{:});
 
Error in
@(hObject,eventdata)DPABI_STAT_TOOL('ComputeButton_Callback',hObject,eventdata,guidata(hObject))
 
Best wishes
Lotus