# Error of cmaes optimizer
**URL:** https://forum.dynare.org/t/error-of-cmaes-optimizer/13084
**Category:** Optimal Policy
**Created:** [12 January 2019 12:55 UTC](https://forum.dynare.org/t/error-of-cmaes-optimizer/13084 "2019-01-12T12:55:44Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@jiang](https://forum.dynare.org/u/jiang)
#### Post date: [12 January 2019 12:55 UTC](https://forum.dynare.org/t/error-of-cmaes-optimizer/13084/1 "2019-01-12T12:55:44Z")
Dear jpfeifer, I saw you used the optimizer cmaes to solve some optimal question. I use you code such as follwing,
%set CMAES options
H0=0.2\*ones(size(x\_start,1),1)
cmaesOptions = options\_.cmaes;
cmaesOptions.LBounds = [-1000;-1000];
cmaesOptions.UBounds = [1000;1000];
[x\_opt\_hat, fhat, COUNTEVAL, STOPFLAG, OUT, BESTEVER] = cmaes(‘welfare\_objective’,x\_start,H0,cmaesOptions,x\_opt\_name);
x\_opt\_hat=BESTEVER.x;
but, I get error like this:
undefined functions or variables ‘startseed’。
error Fun\_cmaes (line 27)
startseed(‘default’);
Would you give me some help? Thanks a lot.
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### Author:  [@jpfeifer](https://forum.dynare.org/u/jpfeifer)
#### Post date: [13 January 2019 09:05 UTC](https://forum.dynare.org/t/error-of-cmaes-optimizer/13084/2 "2019-01-13T09:05:43Z")
In my code I am using the `cmaes`-version delivered with Dynare. There, the random seed has been fixed to make results replicable. You seem to be using the original `cmaes.m`, in which case you need to specify more options.