How To Fix DBMAN251 - Due to cube &1 being locked, query cannot be executed at the moment

SAP Error Message - Details

• Message type: E = Error

• Message class: DBMAN - Data Manager Message Class

• Message number: 251

• Message text: Due to cube &1 being locked, query cannot be executed at the moment

What causes this issue?

The query cannot currently be executed, as there is an exclusive lock on
the InfoCube. This lock can originate from a compression run, a change
run, or selective deletion.

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

<ZU>For NetWeaver systems with an Oracle database system:</>
If a compression run is currently active, this error can still occur
despite the consistent read feature of Oracle if the E and F tables are
read with different logically-related accesses and the compressor
executed a database commit between the start of the first and the end of
the second access.
For normal queries, the read is automatically repeated. This can be
avoided by the fact that E and F tables are no longer read with separate
accesses. To do this, the RSADMIN parameter USE_FACTVIEW must be set to
'ALWAYS'. However, this can have a negative impact on performance.

System Response

How to fix this error?

Check whether a compression run or other change run is active. Wait
until the action has completed and start the query again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DBMAN251 - Due to cube &1 being locked, query cannot be executed at the moment ?

  The SAP error message DBMAN251 indicates that a query cannot be executed because the associated InfoCube (in this case, identified as &1) is currently locked. This typically occurs in SAP BW (Business Warehouse) environments when a data load or a process is ongoing, preventing other operations from accessing the InfoCube.
  Causes:
  
  Data Load in Progress: The most common reason for this error is that a data load process is currently running, which locks the InfoCube to ensure data integrity.
  Process Chains: If a process chain is executing and includes the InfoCube, it will be locked until the process chain completes.
  Manual Locks: Sometimes, manual locks may be placed on the InfoCube for maintenance or other reasons.
  Long-running Queries: If a query is taking a long time to execute, it may hold a lock on the InfoCube.
  
  Solutions:
  
  Wait for Completion: If a data load or process chain is running, the simplest solution is to wait for it to complete. You can monitor the status of the data load in the SAP BW process chain monitor.
  Check Locks: Use transaction SM12 to check for any locks on the InfoCube. If you find locks that are not being released, you may need to investigate further.
  Terminate Long-running Queries: If a query is taking too long, you can use transaction SM66 or SM50 to identify and terminate the long-running query.
  Review Process Chains: Check the process chains that might be locking the InfoCube. You can do this in transaction RSPC.
  Schedule Loads Appropriately: If you frequently encounter this issue, consider scheduling data loads during off-peak hours to minimize conflicts with query execution.
  Consult Basis Team: If the issue persists, it may be necessary to consult your SAP Basis team to investigate further, especially if there are underlying system issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM66: To monitor processes across the system.
  SM50: To view active processes on a specific application server.
  RSPC: To manage process chains.
  
  
  Documentation: Refer to SAP Help documentation for more details on InfoCubes, data loading processes, and query execution.
  Performance Tuning: Consider optimizing your queries and data load processes to reduce the likelihood of locks occurring.
  
  By following these steps, you should be able to resolve the DBMAN251 error and ensure smoother operation of your SAP BW environment.