Attempt to reference field of non-structure array...

Hi, this is my code :

function [] = Test()

S.f = figure('units','pixels',...
  'position',[500 500 200 130],...
  'menubar','none',...
  'numbertitle','off',...
  'name','Run Scenarios',...
  'resize','off');
S.po = uicontrol('style','popupmenu',...
  'units','pix',...
  'position',[10 60 180 60],...
  'string','Power Initialization');
S.pb = uicontrol('style','pushbutton',...
  'units','pix',...
  'position',[10 20 180 30],...
  'string','Make your choice',...
  'callback',{@pb_call,S});

function [] = pb_call(varargin)
% Callback for Test pushbutton.
S = varargin{3};  % Get the structure.
G = get(S.po,'value');
model_path = 'D:\MATLAB\GUI\';
scenarios_path = [model_path 'Scenarios\'];
scenarios_p = dir([scenarios_path 'TS_Sy_MooN_P_*.m']);
path(path,model_path);
path(path,scenarios_path);

if G == 1
  P.f = figure('units','pixels',...
      'menubar','none',...
      'position',[750 500 300 130],'name','Power Initialization Scenarios'); % Create a new GUI.
  P.po = uicontrol('style','popupmenu',...
      'units','pix',...
      'position',[10 60 180 60],...
      'string',{scenarios_p.name});
  P.pb = uicontrol('style','pushbutton',...
      'units','pix',...
      'position',[10 20 180 30],...
      'string','Run Scenarios',...
      'callback',{@P_call,S});
end

function [] = P_call(varargin)
P = varargin(3);
X = get(P.po,{'string','val'});
if ~isempty(X{2})
  run(scenarios_p(X{2}).name);
end
close(gcbf)

When I use the pushbutton of the second GUI, I have this error :

??? Attempt to reference field of non-structure array.

Error in ==> Test>P_call at 46 X = get(P.po,{'string','val'});

??? Error while evaluating uicontrol Callback

And I don't understand why... Thanks !

Answer 1

[Sébastien Malengé]

I find my mistake (P = varargin(3) must be varargin{3})