Error in parameter passing between two .m files (Error using feval and Error while evaluating uicontrol callback)

Hello,

I am working on developing a GUI for a Digital down converter (DDC). DDC works well and I am creating a GUI which feeds inputs to the DDC and displays the frequency spectrum. In the GUI.fig there are two edit text boxes where I enter the frequency values and there is a run button which passes the parameters from GUI.m file to DDC_FILTER.m file. This works well when I run in matlab. Once I create this to executable and run the exe, it throws a error. After working on this I figured out this error might be due to passing parameters from GUI.m to DDC_FILTER.m. The errors are below

1) Error using feval
2) Error while evaluating uicontrol callback
3)Error in GUI_mainfcn
4)Error in pushbutton9_Callback

The code looks like this

IN THE FIG.M FILE

function pushbutton9_Callback(hObject, eventdata, handles)

fsvalue  = str2num(get(handles.fs,'String'));
fpassvalue = str2num(get(handles.fpass,'String'));

[Tsample,Ts,Tfft,filt_sel1,cfir,pfir,reset,cfir_coef,cfir_wt] = ddc_filter(fsvalue,fpassvalue);

IN THE DDC_FILTER.M FILE

function [Tsample,Ts,Tfft,filt_sel1,cfir,pfir,reset,cfir_coef,cfir_wt] = ddc_filter(fsvalue,fpassvalue)
Fs = fsvalue;               
Fpass = fpassvalue;

Any help would be appreciated.

Thanks

Vijay

Answer 1

[Walter Roberson]

In the function that opens the .fig file, add the line

%#function pushbutton9_Callback

GUIDE codes references to GUI callbacks inside of strings where the compiler cannot find them, so the compiler does not know to link the callback function in.

[Image Analyst]

Vijay's "Answer" moved here as a comment:

Hello Walter,

      Do I have to add this line here?

% --- Executes just before DDC is made visible.

function DDC_OpeningFc(hObject, eventdata, handles, varargin)

% Choose default command line output for DDC

handles.output = hObject;

Answer 2

[Vijay]

Hello Walter,

I inserted the line of code in the function that opens the .fig file. I assume this line of code is assumed to be a comment by the matlab script. The compiler is still not able to find the run button.

%#function pushbutton9_Callback

Any help will be appreciated.

Thanks

Vijay