MATLAB: Use a push button to close the GUI

callback errorguideMATLABmatlab guirenaming callbackunrecognized callbackunrecognized function

I have a GUI that has a pushbutton that gets enabled once a certain condition has been met. I want to use that push button to then close the GUI.
here is my code:
function varargout = WorkingGUI3(varargin)
% WORKINGGUI3 MATLAB code for WorkingGUI3.fig
%      WORKINGGUI3, by itself, creates a new WORKINGGUI3 or raises the existing
%      singleton*.
%




%      H = WORKINGGUI3 returns the handle to a new WORKINGGUI3 or the handle to
%      the existing singleton*.
%
%      WORKINGGUI3('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in WORKINGGUI3.M with the given input arguments.
%
%      WORKINGGUI3('Property','Value',...) creates a new WORKINGGUI3 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before WorkingGUI3_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to WorkingGUI3_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help WorkingGUI3
% Last Modified by GUIDE v2.5 26-Sep-2019 17:02:03
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @WorkingGUI3_OpeningFcn, ...
                   'gui_OutputFcn',  @WorkingGUI3_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before WorkingGUI3 is made visible.
function WorkingGUI3_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure

% eventdata  reserved - to be defined in a future version of MATLAB


% handles    structure with handles and user data (see GUIDATA)


% varargin   command line arguments to WorkingGUI3 (see VARARGIN)
handles.uipanels = [handles.uipanel1, handles.uipanel2];
set(handles.pushbutton5, 'enable', 'off');
% Choose default command line output for WorkingGUI3
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes WorkingGUI3 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
end
% --- Outputs from this function are returned to the command line.
function varargout = WorkingGUI3_OutputFcn(hObject, eventdata, handles)
delete(instrfind('Port', 'COM3')); 
tag = serial('COM3'); %check which port is used
fopen(tag);
BOX = char(zeros(2,14));
TrueValueData = 'C:\RfidChipTrueValues.xlsx';
[~,~,TrueValMat] = xlsread(TrueValueData);
% Creates matrix filled with the correct values, 
% indexed by box, which is the first row
% all proceeding rows are the master value
for i=1:inf
 for n = 1:2
     if i>10
         readData = fscanf(tag);
         if length(readData)>12
             BOX(str2num(readData(8)),1:14)= readData(11:24); 
             if strcmp(TrueValMat{2,n}, BOX(n,:)) 
                 set(handles.uipanels(n), 'BackgroundColor', 'g');
             else 
                set(handles.uipanels(n), 'BackgroundColor', 'r');
             end
             drawnow
              if strcmp(TrueValMat{2,1}, BOX(1,:))...
                    && strcmp(TrueValMat{2,2}, BOX(2,:)) == 1
                set(handles.pushbutton5, 'enable', 'on');
            end
             
             
 end
     end
 end
end
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
end
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
closereq();
end
% hObject    handle to pushbutton5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
end
everythig works fine, the button becomes enabled after my conditions are met, but pressing the button does nothing. I have also used closereq, close(handles.WorkingGUI3), delete(handles.WorkingGUI3). all help is appreciated.

Best Answer

Use the close request function
https://www.mathworks.com/help/matlab/ref/closereq.html
function pushbutton5_Callback(hObject, eventdata, handles)
closereq(); 
end
Only use gcf() or gca() when there is no other possible way to get the handle to a figure. For GUIDE GUIs, you can get the handle to the figure from the handles input (example: handles.figure1).
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