HI Gangadhar,
It is a standard BAPI BAPI_ACCSERV_CHECKACCASSIGNMT which is executed from another SAP source system and it will execute one of the custom enchancement in target SAP system. The requirement is I want to stop executing this enhancement when the calls are coming from Source system (through this BAPI).
How is the performance impact of FM 'SYSTEM_CALLSTACK'??? did anyone used it?