Thanks for the reply. I don't have PSB information for the program, my requirement is that I need to make some automated mechanism which will check some specific keywords that should present in IMS-DC calls.
The shop you are doing this for might have home grown or 3rd party host environment interfaces embedded for their IMS TP environments. You will have to take that into account if you are going to scan for specific source code.
That also goes for the PSB source code. We have for example a lot of PSB definition code that is only assembler macro calls with parameters, that on generation time will be expanded into actual PSB generation code.