upgrade from 4.2 to 6.2

[sathiyaraj v]

Hi Polytropon,

Thanks again.
I am doing it for the first time. That's why I am looking for some tutor. I
just tried to add new files  in the existing 4.2. But I ran into
compilation issues. To fix that I am searching file by file. That consumes
lot of my time. That's where I thought of direct upgrade from 4.2 to 6.2.
My understanding is that to upgrade from 4.2 to 6.2 ,we need to take backup
and install new SRC directly. Is that a way or any other easiest way to
achieve that?

Thanks for your patience and time.

Sathya V