How To Fix AQV521 - Table is already being used

AQV521 - Overview

• Message type: E = Error

• Message class: AQV - Message texts for SAP Query

• Message number: 521

• Message text: Table is already being used

What causes this issue?

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

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AQV521 - Table is already being used ?

  The SAP error message AQV521, which states "Table is already being used," typically occurs when there is an attempt to perform an operation on a database table that is currently locked or being accessed by another process. This can happen in various scenarios, such as during data updates, table modifications, or when trying to access a table that is in use by another transaction.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access or modify the same table simultaneously.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the table, preventing other operations.
  Database Locks: The database may have locks in place due to previous operations that have not yet been committed or rolled back.
  Background Jobs: Background jobs or batch processes that are running and accessing the same table can lead to this error.
  
  Solutions:
  
  Wait and Retry: If the error is due to temporary locking, waiting