【求助】为什么guide编写的程序只能运行一次？

[nancy.qq]

下面的程序是用来输出黑体辐射亮度波形的。 需要输入黑体色温和波长范围。
不知道为什么guide编写的程序只能运行一次。 第二次输入新的色温和波长范围后出现错误：

Invalid handle object


程序如下：

function varargout = simpleguii(varargin)
% SIMPLEGUII M-file for simpleguii.fig
% SIMPLEGUII, by itself, creates a new SIMPLEGUII or raises the existing
% singleton*.
%
% H = SIMPLEGUII returns the handle to a new SIMPLEGUII or the handle to
% the existing singleton*.
%
% SIMPLEGUII('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in SIMPLEGUII.M with the given input arguments.
%
% SIMPLEGUII('Property','Value',...) creates a new SIMPLEGUII or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before simpleguii_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to simpleguii_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 simpleguii

% Last Modified by GUIDE v2.5 26-Jun-2007 14:45:26

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @simpleguii_OpeningFcn, ...
'gui_OutputFcn', @simpleguii_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 simpleguii is made visible.
function simpleguii_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 simpleguii (see VARARGIN)



Tc = str2double(get(handles.edit1,'String'));
wave = eval(get(handles.edit2,'String'));

h = 6.6260693e-34;
c = 299792458;
k = 1.3806505e-23;
c1 = 2*pi*h*c^2;
c2 = h*c/k;

spdBlackBody = c1 * (1e-9*wave).^-5 ./ (exp(c2./(Tc.* 1e-9*wave)) - 1);

axes(handles.wave_axes)
plot(wave,spdBlackBody)
set(handles.wave_axes,'XMinorTick','on')
grid on

% Choose default command line output for simpleguii
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes simpleguii wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.

function varargout = simpleguii_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;


% --- Executes on button press in plot.
function plot_Callback(hObject, eventdata, handles)
% hObject handle to plot (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

h = 6.6260693e-34;
c = 299792458;
k = 1.3806505e-23;
c1 = 2*pi*h*c^2;
c2 = h*c/k;

Tc=handles.edit1;
wave=handles.edit2;

spdBlackBody = c1 * (1e-9.*wave).^-5 ./ (exp(c2./(Tc.* 1e-9.*wave)) - 1);

axes(handles.wave_axes)
plot(wave,spdBlackBody)
set(handles.wave_axes,'XMinorTick','on')
grid on



function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

Tc = str2double(get(handles.edit1,'String'))
handles.edit1 = Tc
guidata(hObject,handles)

%NewStrVal = get(hObject,'String')
%NewVal = str2double (NewStrVal)
%handles.edit1=NewVal
%guidata(hObject,handles)



% Hints: get(hObject,'String') returns contents of edit1 as text
% str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit1 (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 edit2_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

wave = eval(get(handles.edit2,'String'))
handles.edit2 = wave
guidata(hObject,handles)

%NewStrVal=get(hObject,'String');
%NewVal = str2double(NewStrVal);
%handles.Wavelength_Input=NewVal;
%guidata(hObject,handles);

% Hints: get(hObject,'String') returns contents of edit2 as text
% str2double(get(hObject,'String')) returns contents of edit2 as a double


% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit2 (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