How to use "error " in code in function

I have a code that works perfectly..

i try to use error in a condition:(it's use in a funcion called in app designer)

if true
    error('Error. \n groupRank contiene ripetizione elementi'); %%check per scurezza..per come ho impostato la logica del rank in groupRank ci deve essere 1 solo sistema nei gruppi di rank!
    return;
end     

and i receive this error:

Error using Calcola_FiltroRaking_Struct

Error. \n groupRank contiene ripetizione elementi

Error in Predator_Filtri_Preset_Struct (line 96)

filtroRanking=Calcola_FiltroRaking_Struct(Sis,Eq,Preset,contract);

Error in PredatorBEGIN_AppDesign_Struct (line 94)

Eq=Predator_Filtri_Preset_Struct(Sis,Eq,Preset); % MI CREA IL Eq.Filtri.filtro_Finale dalla curva base..(usa il filtro_oos PER IL RANKING!!)

Error in Predy/AvvioPredatorButtonPushed (line 583)

[app.eq,app.sis]=PredatorBEGIN_AppDesign_Struct(app.setting,app.preset);

i dont understand the other error (line 96..line 94) what kind of error is

I don't receive ani information about it

I can't to post code...

the code is very elaborate and they are functions called in the app designer

I would like when the error occurs to exit the "Main" program completely but I see that "return" does not do this

Answer 1

[Florian Bidaud]

It is just telling you where the error occurs in each subfunction.

You can't have a return after the 'error' because error WILL error and then stop the code.

Do you really need the error ?

You could just remove it so it would leave the function with the return,

And then throw an error.

For example:

% your code
output = yourFunction(inputs)
if strcmp(output,'error')
    error('Error. \n groupRank contiene ripetizione elementi')
end

function output = yourFunction(inputs)
    % your function code
    if true
        output = 'error';
        return;
    end  
end

[aldo]

in case of check the condition "X" i want to use from main code