The Following is the basic skeleton for my MATLAB program. Each box is a class definition.

Scroll down for the error. Note:

1. Each Class has a custom constructor which does not require an external parameter

The Error

Undefined function or variable 'Troom'.

Error in ==> wall>wall.wall at 31
        function o = wall(Tr)

Error in ==> mainfile at 5
        w1 = wall();

This comes when I create an object of Class wall from another file "mainfile"

Question

1. Why is this happening?
2. Am I getting wrong in the concepts of OOP for Matlab specific?
3. How do I resolve this?

Thanks in Advance!