请教：fmincon约束条件不起作用

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目标函数程序


function f = objfun(x,H)

f = -x*H*x';


约束条件程序
function [c,ceq] =confun(x)
% 非线性不等式约束
c = [];
% 非线性等式约束
ceq = x*x'-1;


x0是1*29行向量，已赋值；
l是1*29行向量，已赋值为0；
H 是29*29矩阵，已赋值；
调用fmincon函数
[x, fval] = fmincon(@(x)objfun(x,H),x0, [], [], [], [], l, [], @confun);

结果显示
Warning: The default trust-region-reflective algorithm does not solve problems
with the constraints you have specified. FMINCON will use the active-set
algorithm instead. For information on applicable algorithms, see Choosing the
Algorithm in the documentation.
> In fmincon at 500
Warning: Your current settings will run a different algorithm (interior-point) in
a future release.
> In fmincon at 505
Solver stopped prematurely.
fmincon stopped because it exceeded the function evaluation limit,
options.MaxFunEvals = 2900 (the default value).

迭代次数超限制，但结果显然不受条件约束，请教为何？

2.44538174517926e+16           2.53751686447813e+16        4.78432047182774e+16          7.28633632307613e+16        2.27625959789299e+16          1.2786571 0133476e+16        6.86918182864094e+16               3.18967767788137e+16。。。。。。。

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关键词：fmincon 约束条件 Min FMI con

请教！！！！！！！！

楼主求赐教
我的出现了这个
fmincon stopped because the size of the current step is less than
the default value of the step size tolerance and constraints are
satisfied to within the default value of the constraint tolerance.