Specifying a callback in Matlab after any runtime error

Question

Is there a way to specify code to be run whenever an error occurs in Matlab? Googling I came across RunTimeErrorFcn and daqcallback, but I believe these are specific to the

Answer 1

One trick is to use Error Breakpoints by issuing the command:

dbstop if error

which when enabled, causes MATLAB to enter debug mode at the point of error. You can access the same functionality from the Debug menu on the main toolbar.

Answer 2

If somebody uses GUI and wants to have a "global" error detection, than solution might look something like this...

function varargout = Program(varargin)
try
      gui_Singleton = 1;
      gui_State = struct('gui_Name',       mfilename, ...
                         'gui_Singleton',  gui_Singleton, ...
                         'gui_OpeningFcn', @program_OpeningFcn, ...
                         'gui_OutputFcn',  @program_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
catch exception
      beep
      h = errordlg('Unexpected error, the program will be restarted.','Syntax      
      error','modal');
      uiwait(h)
      Program
end

Answer 3

If you wrap your code in TRY/CATCH blocks, you can execute code if an error occurs, which can be customized depending on the specific error using the MEXCEPTION object.

try
   % do something here
catch me
   % execute code depending on the identifier of the error
   switch me.identifier
   case 'something'
      % run code specifically for the error with identifier 'something'
   otherwise
      % display the unhandled errors; you could also report the stack in me.stack
      disp(me.message)
   end % switch
end % try/catch