Help with this error

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Muhammad Khan Muhammad Khan
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Help with this error

Hi I am using PIVlab in MATLAB and I am getting following error when I analyze all the frames.
Index exceeds matrix dimensions.

Error in piv_FFTmulti (line 108)
dz1 = [z1(1); diff(z1)];

Error in PIVlab_GUI>AnalyzeAll_Callback (line 1809)
                [x y u v typevector] = piv_FFTmulti (image1,image2,interrogationarea, step,
                subpixfinder, mask, roirect,passes,int2,int3,int4,imdeform);

Error in gui_mainfcn (line 95)

Error in PIVlab_GUI (line 52)
    gui_mainfcn(gui_State, varargin{:});

Error in>@(hObject,eventdata)PIVlab_GUI('AnalyzeAll_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback.