SAP ABAP Message Class AQV Message Number 521 (Table is already being used)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-SRV-QUE (Application Component) SAP Query
     SQUE (Package) Application Development R/3 SAP Query
Attribute
Message class AQV  
Short Description Message texts for SAP Query    
Message Number 521  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20110908   
Message Text
Table is already being used
Help Document

Diagnosis

You tried to insert a table in the join that already exists in this join. This is not allowed.

System Response

Procedure

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