How To Fix RSAWBN026 - Tree is locked and cannot be built

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAWBN - Messages for Administrator Workbench

• Message number: 026

• Message text: Tree is locked and cannot be built

What causes this issue?

The folder nodes (InfoAreas, application components, for example) cannot
be built because the store is locked.

System Response

The tree is not displayed.

How to fix this error?

The lock should usually only be active for a short period of time. Press
the refresh button to display the tree.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSAWBN026 - Tree is locked and cannot be built ?

  The SAP error message RSAWBN026, which states "Tree is locked and cannot be built," typically occurs in the context of SAP BW (Business Warehouse) when there is an issue with the data model or the hierarchy structure that is being used in a query or report. This error indicates that the system is unable to build or access the hierarchy tree because it is currently locked, possibly due to ongoing processes or transactions.
  Causes:
  
  Concurrent Processes: Another user or process may be currently accessing or modifying the hierarchy, causing it to be locked.
  Long-Running Transactions: A long-running transaction or process may have locked the hierarchy tree, preventing other operations from accessing it.
  System Configuration: There may be configuration issues or settings that are causing the hierarchy to be locked.
  Data Load Processes: If data load processes are running, they may lock the hierarchy to ensure data integrity during the load.
  
  Solutions:
  
  Check for Locks: Use transaction codes like SM12 to check for any locks on the hierarchy. If you find locks that are no longer needed, you can release them.
  Wait for Completion: If there are ongoing processes (like data loads or updates), wait for them to complete before trying to access the hierarchy again.
  Restart the Process: If you suspect that a process has hung or is not functioning correctly, you may need to restart it or terminate it if it is safe to do so.
  Check User Permissions: Ensure that you have the necessary permissions to access and modify the hierarchy.
  Consult Basis Team: If the issue persists, consult your SAP Basis team to investigate any underlying system issues or to check for any system-wide locks.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), SM12 (Display and Delete Locks), and SM21 (System Log) for troubleshooting.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review SAP documentation related to BW hierarchies and data modeling to ensure that your configurations are correct.
  
  If the problem continues after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.