Portfolio optimization tool and GUI "Too many input arguments"

Hi, I'm learning about OOP in Finance and found out this great webinar from 2010 called "Build a Portfolio Analysis Application using Object Oriented Programming Techniques". I'm trying to run the code (originally written in 2010a) in 2017b and I'm stucked with the warning "Too Many Input Arguments". I Traced the error source to a Callback of the GUI that executes a method called computeEfficientFrontier(this,constraintSet). The function takes only 1 argument outside the Object definition and only 1 argument (a Matrix) was passed, neverttheless I keep getting the Warning and the code aborts. Can somebody help me out with this..., Here's the code:

        function error_msg = compute_EfficientFrontier(this,constraintSet)
        % Compute efficient frontier

            % constraintSet:  optional constraints matrix (e.g. from portcons)
            % error_msg:      contains error message in case of failure, empty otherwise

            % predefine output
            error_msg = [];

            % only run if data available
            if isempty(this.prices(:,this.assetselection))
                error_msg = 'No data available';
                return
            end

%%And the callback that triggers the warning:

    % Optimize portfolios 
    msg = handles.model.computeEfficientFrontier(conSet);
    if ~isempty(msg)
        % enable control
        set(handles.button_portopt_computeefficientfrontier,'Enable','on');    
        msgbox(msg,'Warning');
        return
    end

[Geoff Hayes]

Diego - please copy and paste the full error message (all of the red text).

[Diego Ochoa]

No red text. Only msgbox Warning.

[Diego Ochoa]

Ok, finally got the red tape...

      Error using message
  Invalid Message ID format: 'Too many input arguments.'.

Error in portfoliotool>button_portopt_computeefficientfrontier_Callback (line 1200)
        error(message(msg));

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in portfoliotool (line 25)
    gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)portfoliotool('button_portopt_computeefficientfrontier_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.

Answer 1

[Diego Ochoa]

So, yes, I'm answering my own question with a high probability it will be erased soon. As it comes, the Msg warning comes because the computeEfficientFrontier method calls the Financial toolbox portopt , which will be deprecated and no longer takes as arguments the constraint set. So more arguments were passed than allowed. Here the text in the Doc:

portopt has been partially removed and will no longer accept ConSet or varargin arguments. Use Portfolio instead to solve portfolio problems that are more than a long-only fully-invested portfolio. For information on the workflow when using Portfolio objects, see Portfolio Object Workflow. For more information on migrating portopt code to Portfolio, see portopt Migration to Portfolio Object.