Error in converting code to VHDL

[Jamil Hayder]

Hi, Can some one please help out.Thanks. I am trying to convert below
code to VHDL using HDL Coder but getting error .Please can you have a look on it and see whats the
mistake in block diagram.

x1=[1 2 3 4 5 6 7 8 9];
x2=[3 4 5 6 7 8 9 2 1];
n=length(x1);
xc=zeros(2*n-1,1);
for i=1:2*n-1
if(i>n)
j1=1;
k1=2*n-i;
j2=i-n+1;
k2=n;
else
j1=n-i+1;
k1=n;
j2=1;
k2=i;
end
xc(i)=sum(conj(x1(j1:k1)).*x2(j2:k2));
end
xc=flipud(xc);


Error:

Cannot connect to model 'prc4'; please try Update Diagram (Ctrl-D).

Error due to multiple causes.

Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)

Error in port widths or dimensions. Output port 1 of 'prc4/MATLAB
Function/u' is a one dimensional vector with 1 elements.