SAP ABAP Message Class 01 Message Number 391 (User &1 is not a reference user (see long text))
Hierarchy
☛ SAP_BASIS (Software Component) SAP Basis Component
   ⤷ BC-SEC-USR-ADM (Application Component) User and Authorization Management
     ⤷ SUSR (Package) ABAP User Administration
Attribute
Message class 01  
Short Description General Basis, e.g. user and authorization maintenance    
Message Number 391  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20130531   
Message Text
User &1 is not a reference user (see long text)
Help Document

Diagnosis

You enter user as reference user. However, this user does not have the user type "reference user".

System Response

The system displays a message.

Procedure

You can set the message type of this message using a Customizing switch. To do this, make an entry in the table PRGN_CUST containing the ID REF_USER_CHECK and one of the following values:

W - Warning (default, no entry required)
E - Error message. Users that do not have the user type "Reference" cannot be entered as reference users.
S - Message
I - Ignore user type, no message

History
Last changed on/by 20140121  SAP 
SAP Release Created in