Hi Siddharth,
We left this error aside which we were getting whilst uploading composite roles.
We uploaded single roles for MSS and as I mentioned above, we were getting exception error.
We created system aliases in system landscape and now able to launch all services on MSS.
Error was coming bcz EP system alias was different from the alias maintained in lpd_cust.
My issue is resolved.
Thanks a ton for all support and expert inputs.
Regards
Shipra