Siddharth,
Thanks for the input. I am using the same alias to employee profile used for other services which are working. I have cleared the cache, Deactivated and reactivated , deleted and re added service etc. Attaching the screen shot where ToEmployeeCards return 200 while ToEmployeeOverview returns 500 for the same service HRESS_EMP_PROFILE/EmployeeCollection.
On debug found FM -HR_SEN_PERIOD_DURAT_BY_FMDUR has bug and is dumping when it uses the defauly rule 0100.
Hope SAP release a snote SOON.
Appreciate your help!