How do I resolve this package subclass path error?

Hi all,

In R2014a, I've subclassed a class within a package hierarchy, where B subclasses A:

 subclasstest/
 └── +mypkg
     └── +mysubpkg
         ├── @A
         │   └── A.m
         └── @B
             └── B.m

My commands are:

cd subclasstest;
addpath(genpath(pwd));
import mypkg.mysubpkg.A
which A % /Users/cjones/subclasstest/+mypkg/+mysubpkg/@A/A.m  % mypkg.mysubpkg.A constructor
a = A(1);  % a = A with properties: x: 1 y: []
import mypkg.mysubpkg.B
which B % /Users/cjones/subclasstest/+mypkg/+mysubpkg/@B/B.m  % mypkg.mysubpkg.B constructor
b = B(1,2); % Expecting B with properties x:1 y:2
Error using mypkg.mysubpkg.B
The specified superclass 'A' contains a parse error, cannot be found on MATLAB's search path, or is   
shadowed by another file with the same name.

However, when I use the classes out of the package, I don't get the error:

 subclasstest2/
 ├── A.m
 └── B.m

With:

clear all; clear import;
cd ../subclasstest2/
addpath(genpath(pwd));
which A % /Users/cjones/subclasstest2/A.m  % A constructor
a = A(1);  % a = A with properties: x: 1 y: []
which B % /Users/cjones/subclasstest2/B.m  % B constructor
b = B(1,2); % B with properties x:1 y:2

What am I doing wrong in the package hierarchy that would cause this error? I've seen this error message in many other postings after a bit of Googling, but I'm not seeing a clear answer. These classes use the 'classdef'-style syntax. Thanks much.

Answer 1

[Christopher Jones]

The issue here was that I was not subclassing with the correct syntax. Instead of using:

classdef B < A
  % ...
end

I should have used:

classdef B < mypkg.mysubkg.A
  % ...
end

I needed to use the fully qualified class name.

[DANIEL HALLMAN]

Thanks so much for this. I ran into a similar issue and this solved it.