To enable communication between the SAP source system and a BW system, you have to create an RFC user in the SAP source system.
An RFC user enables multiple RFC connections. Skip this step if an RFC user has already been created in the SAP source system.
In the SAP Menu, choose.
Enter a user name, RFCUSER for example.
On the Logon data tab page, select user type System and enter a password.
On the Profiles tab page, assign profile S_BI-WX_RFC to the user:
Save your entries.