Why does loading my MATLAB Class object with DBSTOP IF ERROR find errors, but normally no errors are found in MATLAB 7.7 (R2008b)

I have the following class definition:

classdef test

      properties (SetAccess = 'private')

          p = '';

      end

      methods

          function testobj = set.p(testobj, q)

              if ~(strcmp(q,'a'))

                  error('error')

              end

              disp('Listened to p');

              testobj.p = q;

          end

      end

end

If you instatiate a copy of the above class by typing,

a = test;

save a

load a

Nothing happens and the code loads. However, if I first type

dbstop if error

and then execute the same lines as before, the debugger finds the error.

Answer 1

[MathWorks Support Team]

Generally, the LOAD command tries to load as much as possible and so it never throws real errors unless it detects a corrupt file and is unable to continue. Using "dbstop if all error" is a good way to debug problems during load.