MATLAB: Please help!

c++ export generation error

Hello All
I got this error while I tried to export cuckoo search Matlab code file which is provided in your website to c++ in this link http://www.mathworks.com/matlabcentral/fileexchange/29809-cuckoo-search-cs-algorithm/content/cuckoo_search.m
the error is:
>> coder -build Untitled2.prj ??? Undefined function or variable 'nest'. The first assignment to a local variable determines its class.  Error in ==> cuckoo_search Line: 63 Column: 44 Code generation failed: Open error report.
the error appear wherever their are variables, I don't know way! Please how to overcome this error ??
I appreciate your advice !

Best Answer

Hi,
please preallocate the output variables first, because the first appearance of nest is in a loop where you populate it,
nest(i,:)=Lb+(Ub-Lb).*rand(size(Lb));
Matlab Coder dont know the size/type of nest.
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