Array dimensions must match for binary array op.

I have two groups of images (patients and control subjects) and I am try to perform a two sample t-test but I keep getting this error ''Array dimensions must match for binary array op.'' even though I checked the dimensions of all my images are they are the same (x=46, y=55, and z=46) and their sizes to are the same (voxel size= 3 x 3 x 3). Please I really need help to solve this problem. I am confused as to what array dimensions they are talking about.

Error in y_GroupAnalysis_Image (line 60)

MaskData = any(DependentVolume,4) .* MaskData; % skip the voxels with all zeros

Error in y_TTest2_Image (line 84)

[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 521)

y_TTest2_Image(S, OutputName, MaskFile, ImageCell, TextCell, PALMSettings);

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in DPABI_STAT_TOOL (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)DPABI_STAT_TOOL('ComputeButton_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

[Mehmed Saad]

Error in y_GroupAnalysis_Image (line 60)

MaskData = any(DependentVolume,4) .* MaskData; % skip the voxels with all zeros

what is initial value of MaskData?

put a break point on this line and see the size of any(DependentVolume,4) and MaskData

[Tommy]

MaskData = any(DependentVolume,4) .* MaskData;

The error message indicates that the problem is in this line. Can you be sure that the result of any(DependentVolume,4) has the same number of elements as MaskData?

[Elijah Agoalikum]

Thank you all. I just realized that the dimension of the mask file I used is different from the dimension of the images.