error in drawing masks for current frame

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Rickyli Rickyli
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error in drawing masks for current frame

I got these error and don't know how to fix them

Error using imread>get_full_filename (line 481)
File ".\point.png" does not exist.

Error in imread (line 344)
    filename = get_full_filename(fid, errmsg, filename);

Error in polygonSymbol/makePointInsertCursor (line 74)
        cursor = imread(fullfile(ipticondir,'point.png'));

Error in polygonSymbol/initialize (line 67)
        point_cursor = makePointInsertCursor();

Error in basicPolygon (line 36)

Error in impoly>impolyAPI (line 220)
  basicPolygonAPI = basicPolygon(h_group,draw_api,positionConstraintFcn);

Error in impoly (line 96)
            [h_group,draw_api] = impolyAPI(varargin{:});

Error in iptui.roiPolygon (line 10)
            obj = obj@impoly(h_parent,[]);

Error in createWaitModePolygon (line 17)
h_poly = iptui.roiPolygon(h_ax,finished_cmenu_text);

Error in roipoly>parse_inputs (line 172)
    [xi,yi,placement_cancelled] = createWaitModePolygon(gca,cmenu_text);

Error in roipoly (line 80)
[xdata,ydata,num_rows,num_cols,xi,yi,placement_cancelled] = parse_inputs(varargin{:});

Error in PIVlab_GUI>draw_mask_Callback

Error in gui_mainfcn (line 95)

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

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

anybody can help me? thanks!!