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
