Hello, thanks for the reply.

As you mentioned in the reply I tried creating a simple geometry of radiation in between two parallel plates to see how .s2s file is getting generated.

But I am unable to understand how surface to surface view factor is mentioned in the file. I named radiating surfaces as 1 and 2 and I was expecting to see the those named faces in the file opened by notepad but that's not the case. Also generated file has unreadable text. 

I am enclosing herewith geometry created for your reference. I am unable to attach notepad file created though. 

Kind Regards,