feval call to a subfunction fails when it is in a subfunction

[Sidney Markowitz]

I'm new to using Octave and don't know if this is a bug in my code, a 
bug in Octave, or something wrong with my installed copy of Octave.

The following code demonstrates the problem. The first feval, in the 
main function, works and the result is displayed. The other feval, 
inside the subfunction switchyard2, gets an error in line 9
 error: feval: function `mysin' not found

I am using Octave version 3.2.2 compiled on my Macbook under MacOS 
10.6.1, downloaded and built from Macports. I put the following text in 
a file named ./switchyard.m and invoked it in the Octave command line by 
typing   switchyard(10)

Do others get the same results? Is there a bug in my example code? Is it 
a bug in Octave?

function y = switchyard(x)
   z = feval('mysin', x);
   disp(z);
   y = switchyard2(x);
  return;
endfunction

function y = switchyard2(x)
  y = feval('mysin', x);
  return;
endfunction

function y= mysin(x)
  y = sin(x);
 return;
endfunction