SAP ABAP Message Class 5A Message Number 503 (&2 &4 is locked by you.)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-BMT-OM (Application Component) Organizational Management
     SP00 (Package) Organization and Planning
Attribute
Message class 5A  
Short Description Basis Personnel Management    
Message Number 503  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20130531   
Message Text
&2 &4 is locked by you.
Help Document

Diagnosis

The object (object-ID ) is already being processed by you. Perhaps you are currently processing the object in another session.

The system does not allow changes to this object.

Please first complete your changes in the other session.

If the object was locked by accident, it can be unlocked manually in the usual way. The relevant table is PLOGI.

History
Last changed on/by 20130531  SAP 
SAP Release Created in