MATLAB: bnb20 (Branch and Bound Method) Optimization -

i've got error when running following code in matlab. i'm trying use bnb20.

    function [errmsg,z,x,t,c,fail] = optimize_bnb_test         p = [34336 701 227 2860 32841 463 616 39769 331 1224 1515 472583  1021 969 9260 39380 4986 6567 3386 16926 4841 100635];         c = 31300;                 = [-c 0 0; 0 -c 0; 0 0 -c;];                 b =[-p(1); -p(2); -p(3);];         function y = linear_objective(n)             y = [1, 1, 1] * n;         end             lb = [1; 1; 1;];         ub = [16; 16; 16; ];          [errmsg,z,x,t,c,fail] = bnb20('linear_objective',lb,[],lb,ub,a,b, [],[],[],[],[],[]);             end 

i got error message 'fun cause error.'

i don't know why.

i'm learning matlab.

update:

    function [errmsg,z,x,t,c,fail] = optimize_bnb_test     p = [34336 701 227 2860 32841 463 616 39769 331 1224 1515 472583 1021 969 9260 39380 4986 6567 3386 16926 4841 100635];     c = 31300;             = [-c 0 0; 0 -c 0; 0 0 -c;];             b =[-p(1); -p(2); -p(3);];      lb = [1; 1; 1;];     ub = [16; 16; 16;];     fun = @(x)x(1)+x(2)+x(3);      [errmsg,z,x,t,c,fail] = bnb20('fun',lb,[],lb,ub,a,b,[],[],[],[],[]);              end 

error message changed:

i don't know now..

the error happens following call:

eval(['z=',fun,'(x0,varargin{:});'],'errmsg=''fun caused error.''; evalreturn=1;'); 

my guess varargin{:} giving error function. looks don't use it, empty. try either of:

1.- delete last ,[] call bnb20 13th input argument optional, instead of giving empty array ([]), don't give anything.

2.- when define function evaluate, define input arguments dump (or not use them).

function y = linear_objective(n,varargin)        y = [1, 1, 1] * n; end