MATLAB: Help with this problem please

app designerinputdlg

hellos Folks,
i'm working on appdesigner and i'm using inputdlg to ask the user to save the results to wrokspace, I'm usng this code
  prompt = {'Choose the figure name','Choose the Tree name',...
                    'Choose the Clusters name','Choose the Roots name'};
               
                answer=inputdlg(prompt);
                
                if ~isempty(answer{1})
                    assignin('base',answer{1},app.Figure);
                end
                if ~isempty(answer{2})
                    assignin('base',answer{2},app.Tree);
                end
                if  ~isempty(answer{3})
                    assignin('base',answer{3},app.Clusters);
                end
                if ~isempty(answer{4})
                    assignin('base',answer{4},app.Roots);
                end
the problem is when i click Cancel button i obtain this error
Any soulutions please ?

Best Answer

A good option is to use the try catch statement, then:
prompt = {'Choose the figure name','Choose the Tree name',...
                    'Choose the Clusters name','Choose the Roots name'};
answer=inputdlg(prompt);
try
    if ~isempty(answer{1})
        assignin('base',answer{1},app.Figure);
    end
    if ~isempty(answer{2})
        assignin('base',answer{2},app.Tree);
    end
    if  ~isempty(answer{3})
        assignin('base',answer{3},app.Clusters);
    end
    if ~isempty(answer{4})
        assignin('base',answer{4},app.Roots);
    end
catch
    %Some things to do if answer is not complete
end
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