Dear Alfonso and everyone, 

When I click "preprocessing" I get the following error message:

Error using uiwait (line 48)
Input argument must be of type figure

Error in conn_setup_preproc (line 478)
uiwait(dlg.fig);


Error in conn (line 1081)
ok=conn_setup_preproc("varargin{2:end});


Error in conn_menumanager (line 120)


Feval(CONN_MM{n0}.callback{n1}{1}.CONN_MM_MENU{n0}.callback{n1}{2:end});

Any idea what could be going wrong?

Thank you!