Fanuc Robotic virtual Robot Controller V5.20

I don't believe that it goes back that far, at least not for RoboGuide.

V5.3 is as far back as Roboguide goes. I have all the versions loaded. You're best bet is to make a Robot with 5.3 & start loading in the appropriate files.

If you are feeling risky, you can just modify the backdate.dt file with a text editor to say it is a V5.30 controller, and see if it recreates it.

Quote from sanjay bisht

I tired editing the text file , but weldpro says " file is not loadable" so it think editing .DT won't help

As far I know, the oldest FRVRC is 5.30, but...

It has some problems to work on Windows 10, and even in Windows 7 (or any other 64 bit version of Windows).

I had previous experiences where I could install it on a modern OSes, but it invariably broke RoboGuide at some point.

If You have the chance and the resources, try what bencor21 and Nation told You, but with an 32 bits OS.