MATLAB: Is the GUI program producing an error when I ‘Run’ it

gui errorolddocs

When I run the below .m file, it gives me the following error:
Error using feval
Undefined function 'frequency_axes_CreateFcn' for input arguments of type 'matlab.graphics.axis.Axes'.
Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in TestInterface (line 43)
    gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)TestInterface('frequency_axes_CreateFcn',hObject,eventdata,guidata(hObject))
Any idea why? Here's the code from my .m:
function varargout = TestInterface(varargin)
% TESTINTERFACE Application M-file for TestInterface.fig
%   TESTINTERFACE, by itself, creates a new TESTINTERFACE or raises the existing
%   singleton*.
%




%   H = TESTINTERFACE returns the handle to a new TESTINTERFACE or the handle to
%   the existing singleton*.
%
%   TESTINTERFACE('CALLBACK',hObject,eventData,handles,...) calls the local
%   function named CALLBACK in TESTINTERFACE.M with the given input arguments.
%
%   TESTINTERFACE('Property','Value',...) creates a new TESTINTERFACE or raises the
%   existing singleton*.  Starting from the left, property value pairs are
%   applied to the GUI before two_axes_OpeningFunction gets called.  An
%   unrecognized property name or invalid value makes property application
%   stop.  All inputs are passed to TestInterface_OpeningFcn via varargin.
%
%   *See GUI Options - GUI allows only one instance to run (singleton).
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help TestInterface
% Copyright 2001-2006 The MathWorks, Inc.
% Last Modified by GUIDE v2.5 31-May-2015 00:38:11
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',          mfilename, ...
                   'gui_Singleton',     gui_Singleton, ...
                   'gui_OpeningFcn',    @TestInterface_OpeningFcn, ...
                   'gui_OutputFcn',     @TestInterface_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 TestInterface is made visible.
function TestInterface_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 TestInterface (see VARARGIN)
% Choose default command line output for TestInterface
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes TestInterface wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = TestInterface_OutputFcn(hObject, eventdata, handles)
% 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;
% --------------------------------------------------------------------
function plot_button_Callback(hObject, eventdata, handles, varargin)
% hObject    handle to plot_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
set(0,'DefaultFigureColor','White',...
     'defaultaxesfontsize',8,...
     'DefaultAxesFontname','Calibri',...
     'DefaultTextFontName','Calibri')
x = [0:20];
y = [0:20];
% Get user input from GUI
f1 = str2double(get(handles.f1_input,'String'));
f2 = str2double(get(handles.f2_input,'String'));
constant = str2double(get(handles.constant,'String'));
% Calculate data
TestFormula = @(x,y)(x + y.*constant);
[X,Y] = meshgrid(x,y);
Z1 = TestFormula(X,Y);
Z2 = TestFormula(f1,f2);
% Create frequency plot in proper axes
%plot(handles.frequency_axes,f,m(1:257))
s1 = surf(X,Y,Z1)
set(handles.edit5,'String',Z2)
xlabel('X', 'fontweight', 'bold')
ylabel('Y', 'fontweight', 'bold')
%title('(A)', 'FontSize', 12, 'fontweight', 'bold')
view (135,15);
yh = get(gca,'YLabel'); % Handle of the y label
set(yh, 'Units', 'Normalized')
pos = get(yh, 'Position');
set(yh, 'Position',pos.*[0.85,0.6,1],'Rotation',-10.9)
xh = get(gca,'XLabel'); % Handle of the x label
set(xh, 'Units', 'Normalized')
pos = get(xh, 'Position');
set(xh, 'Position',pos.*[1,1,1],'Rotation',11.1)
zlabel('Z', 'fontweight', 'bold')
zh = get(gca,'ZLabel'); % Handle of the z label
set(zh, 'Units', 'Normalized')
pos = get(zh, 'Position');
set(zh, 'Position',pos.*[1.5,1,0],'Rotation',90)
%set(handles.frequency_axes,'XMinorTick','on')
axis tight
camlight
lighting phong
shading interp
set(s1,'FaceColor',[0 0.63 0.91], 'edgecolor',[0 0 0.4],'meshstyle','both','linewidth',.15);
grid on
function f1_input_Callback(hObject, eventdata, handles)
% hObject    handle to f1_input (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of f1_input as text

%        str2double(get(hObject,'String')) returns contents of f1_input

%        as a double

% Validate that the text in the f1 field converts to a real number
f1 = str2double(get(hObject,'String'));
if isnan(f1) || ~isreal(f1)  
    % isdouble returns NaN for non-numbers and f1 cannot be complex
    % Disable the Plot button and change its string to say why


    set(handles.plot_button,'String','Cannot plot f1')
    set(handles.plot_button,'Enable','off')
    % Give the edit text box focus so user can correct the error


    uicontrol(hObject)
else 
    % Enable the Plot button with its original name


    set(handles.plot_button,'String','Plot')
    set(handles.plot_button,'Enable','on')
end
function f2_input_Callback(hObject, eventdata, handles)
% hObject    handle to f2_input (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of f1_input as text
%        str2double(get(hObject,'String')) returns contents of f1_input
%        as a double
% Validate that the text in the f2 field converts to a real number
f2 = str2double(get(hObject,'String'));
if isnan(f2) ...          % isdouble returns NaN for non-numbers
        || ~isreal(f2)    % f1 should not be complex

    % Disable the Plot button and change its string to say why
    set(handles.plot_button,'String','Cannot plot f2')
    set(handles.plot_button,'Enable','off')
    % Give the edit text box focus so user can correct the error
    uicontrol(hObject)
else 
    % Enable the Plot button with its original name
    set(handles.plot_button,'String','Plot')
    set(handles.plot_button,'Enable','on')
end
function edit5_Callback(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double
% --- Executes during object creation, after setting all properties.

function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

%       See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end
function constant_Callback(hObject, eventdata, handles)
% hObject    handle to constant (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of constant as text
%        str2double(get(hObject,'String')) returns contents of constant as a double
constant = str2double(get(hObject,'String'));
if isnan(constant) ...          % isdouble returns NaN for non-numbers
        || ~isreal(constant)    % f1 should not be complex
    % Disable the Plot button and change its string to say why
    set(handles.plot_button,'String','Cannot plot constant')
    set(handles.plot_button,'Enable','off')
    % Give the edit text box focus so user can correct the error
    uicontrol(hObject)
else 
    % Enable the Plot button with its original name
    set(handles.plot_button,'String','Plot')
    set(handles.plot_button,'Enable','on')
end
% --- Executes during object creation, after setting all properties.
function constant_CreateFcn(hObject, eventdata, handles)
% hObject    handle to constant (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

Best Answer

You probably copied a GUIDE-created .fig and edited it, instead of opening the interface in GUIDE and telling GUIDE to save it under a new name. Or perhaps you deleted an axes named frequency_axes without going through GUIDE to do so.
Are you launching the interface by double-clicking on the .fig or by commanding
TestInterface
on the command line? Double-clicking would invoke a callback saved with the .fig and it is that callback,
@(hObject,eventdata)TestInterface( 'frequency_axes_CreateFcn', hObject,eventdata,guidata(hObject))
that is causing the problem.
The quick fix is adding a function to your file,
function frequency_axes_Createfcn(varargin)
that does nothing.
The longer term fix is to use the figure browser to find that callback and delete it. Or you can use findobj() or findall() to retrieve the figure properties, look at the callback functions, find the errant one and overwrite it, and re-save the .fig.
Related Question