The bug of using 'evalFcn'

[dingshansun]

When I am trying to calculate the three objective values using one function, I find 'evalFcn' is a good alternative to 'objFcn', since it get all the three objective values at the same time, and you do not need three separate functions for the three objectives. However, when I tried the template provided from the documentation in Page 8, the error occurred.

This is the code:

clear
clc

platemo('evalFcn',@Eval, 'encoding',[1,1,1,2,2,4],'lower',0,'upper',[1,9,9,9,9,9],'M',2)

function [x,f,g] = Eval(x)
    x = [round(x(1)/0.1)*0.1,x(2:end)];
    x = max(0,min([1,9,9,9,9,9],x));
    f(1) = x(1)+sum(x(2:end));
    f(2) = sqrt(1-x(1)^2)+sum(x(2:end));
    g = 1-sum(x(2:end));
end

and this is the error information:

Error using assert
the size of its output #2 should be 1*1,
while its current size is 1*2.

Error in UserProblem>CallFcn (line 233)
            assert(ismatrix(varargout{i})&&all(size(varargout{i})==varargin{i}),'the size of its output #%d should be %d*%d, while its current size is %d*%d.',i,varargin{i}(1),varargin{i}(2),size(varargout{i},1),size(varargout{i},2));

Error in UserProblem/Evaluation (line 83)
                        [PopDec(i,:),PopObj(i,:),PopCon(i,:)] = CallFcn(obj.evalFcn,varargin{1}(i,:),obj.data,'evaluation function',[1 obj.D],[1 1],[1 1]);

Error in PROBLEM/Initialization (line 130)
            Population = obj.Evaluation(PopDec);

Error in UserProblem/Initialization (line 72)
                Population = Initialization@PROBLEM(obj,N);

Error in UserProblem (line 61)
            Pop   = obj.Initialization(1);

Error in platemo (line 96)
            Problem     = PRO(input{:});

Error in untitled3 (line 5)
platemo('evalFcn',@Eval, 'encoding',[1,1,1,2,2,4],'lower',0,'upper',[1,9,9,9,9,9],'M',2)

Caused by:
    The evaluation function is invalid

Everyone can try this demo easily. If anyone find it is feasible, then it must be my problem. Otherwise, it is an important bug.