Diagnosis
You have used the Secure Network Communication (SNC) function to logon. At the same time, you specified an R/3 user name. However theexternal (SNC) name delivered from the external security system to theR/3 System is not assigned to the specified user in table USRACL.

System Response
The system refuses the logon.

Procedure
Log on with the permitted user name, or use the user maintenancetransaction (Transaction SU01) to assign the SNC name to the user.