sigma delta design toolbox “delsig”中clans()函数

调用synthsizeNTF()没有问题。
但调用了clans（）函数，发生如下错误，请问如果解决啊? 多谢了。
说明书上说这个函数需要optimaztion toolbox支持。我安装的matlab中有..\toolbox\optim\， 应该就是这个函数了吧?
再次感谢你的阅读和解答
>> H= clans(5,32,5,.95,1)
Warning: Options LargeScale = 'off' and Algorithm = 'trust-region-reflective' conflict.
Ignoring Algorithm and running active-set method. To run trust-region-reflective, set
LargeScale = 'on'. To run active-set without this warning, use Algorithm = 'active-set'.
> In fmincon at 410
In clans6 at 35
In clans at 19
Warning: This zpk model has a complex gain or some complex zeros or poles that do not come in
conjugate pairs.
> In warning at 26
In zpk.zpk at 232
In dsclansNTF at 20
In clans6>dsclansObj6a at 44
In clans6>@(x)dsclansObj6a(x,order,OSR,Q,rmax,Hz) at 35
In fmincon at 517
In clans6 at 35
In clans at 19
Warning: This zpk model has a complex gain or some complex zeros or poles that do not come in
conjugate pairs.
> In warning at 26
In zpk.zpk at 232
In dsclansNTF at 20
In clans6>dsclansObj6b at 51
In clans6>@(x)dsclansObj6b(x,order,OSR,Q,rmax,Hz) at 36
In fmincon at 597
In clans6 at 35
In clans at 19
? Error using ==> lti.impulse at 66
Cannot simulate the time response of LTI models with complex data.
Error in ==> clans6>dsclansObj6b at 52
g = sum(abs(impulse(H,100))) -1 - Q;
Error in ==> clans6>@(x)dsclansObj6b(x,order,OSR,Q,rmax,Hz) at 36
[],[],[],[],[],[],@(x)dsclansObj6b(x,order,OSR,Q,rmax,Hz), options );
Error in ==> fmincon at 597
[ctmp,ceqtmp] = confcn{3}(X,varargin{:});
Error in ==> clans6 at 35
x = fmincon(@(x)dsclansObj6a(x,order,OSR,Q,rmax,Hz),x, ...
Error in ==> clans at 19
NTF=clans6(order,OSR,Q,rmax,opt);
Caused by:
Failure in initial user-supplied nonlinear constraint function evaluation. FMINCON cannot
continue.

没有出现过呀。