How To Fix RSDD302 - Writing to aggregate &3 not possible due to block by user &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD - Message class for data manager

• Message number: 302

• Message text: Writing to aggregate &3 not possible due to block by user &1

What causes this issue?

The aggregate must be blocked for the creation of aggregate &V3& in
InfoCube &V2&. The aggregate is, however, already blocked by another
transaction from user &V1&.
With the other transaction, we could be dealing with a creation of the
aggregate, or with the maintenance of the aggregate or aggregate &V3&
is currently being read for the creation of another aggregate.

System Response

The creation of the aggregates is terminated.

How to fix this error?

Check why aggregate &V3& is being blocked by user &V1& and start the
creation of the aggregate again at a later date.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD302 - Writing to aggregate &3 not possible due to block by user &1 ?

  The SAP error message RSDD302 indicates that there is an issue with writing to an aggregate in the SAP BW (Business Warehouse) system. The message specifically states that the operation is blocked by a user, which means that a user has locked the aggregate for some reason, preventing other users from making changes or updates to it.
  Cause:
  
  User Lock: The aggregate is currently locked by a user who is performing an operation that requires exclusive access to the aggregate. This could be due to a long-running process or a manual lock placed by a user.
  System Maintenance: Sometimes, system maintenance activities or data loading processes can lead to temporary locks on aggregates.
  Transaction Errors: If a previous transaction did not complete successfully, it might leave the aggregate in a locked state.
  
  Solution:
  
  Identify the Locking User: Use transaction code SM12 to check for user locks. You can filter by the aggregate name or the user ID to find out who is holding the lock.
  Release the Lock: If you identify the user who is holding the lock and it is safe to do so, you can manually delete the lock entry from SM12. However, ensure that the user is not currently performing any critical operations.
  Wait for Completion: If the lock is due to a legitimate process (like data loading), you may need to wait for that process to complete before attempting to write to the aggregate again.
  Check for Background Jobs: Use transaction code SM37 to check for any background jobs that might be running and causing the lock. If a job is stuck, you may need to terminate it.
  Consult with the User: If the locking user is available, consult with them to understand why the lock is in place and if it can be released.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage user locks.
  SM37: To monitor background jobs.
  RSD1: To manage InfoObjects and aggregates in BW.
  
  
  Documentation: Refer to SAP Help documentation for more details on aggregate management and locking mechanisms in BW.
  Performance Considerations: Regularly monitor and manage locks to avoid performance bottlenecks in the BW system.
  
  By following these steps, you should be able to resolve the RSDD302 error and successfully write to the aggregate.