SAP ABAP Message Class S> Message Number 533 (User ID for type & must be numeric, not alphanumeric.)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-FES-ITS (Application Component) SAP Internet Transaction Server
     SITS_ABAP (Package) ITS ABAP Components
Attribute
Message class S>  
Short Description Maintenance transaction for IAC    
Message Number 533  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20130531   
Message Text
User ID for type & must be numeric, not alphanumeric.
History
Last changed on/by 20140121  SAP 
SAP Release Created in