When deploytool , 'Unable to determine function name or input/output argument count for function in M-file 'filename'...

Whe I use the deploytool ,then build ,the error appears:

       Unable to determine function name or input/output argument count for function in Matlab file 'filename.m'...

So I use Checkcode('filename.m'):

 L 80 (C 10-26): THe function 'pshtnpcm1_Callback' might be unused.
 L 93 (C 10-26): THe function 'pshtnpcm2_Callback' might be unused.

As a matter of fact , in 'pshtnpcm1_Callback' :

   [~,b] = uigetfile();
   set(handles.edit2,'String',b);

in 'pshtnpcm2_Callback' :

    c = uigetdir();
    set(handles.edit1,'String',c);

I don't know why it can not use deploytool to produce '*.exe' file. Thank you !