Message Number list used by SAP ABAP Program UPGADDUSR (create user during upgrade for SPDD (SU01 is not possible))
SAP ABAP Program UPGADDUSR (create user during upgrade for SPDD (SU01 is not possible)) is using
# Object Type Object Name Object Description Note
     
1 Message Number  01 - 088 User & exists
2 Message Number  01 - 498 You are not authorized to create users