How To Fix AO170 - The master data lock was removed for &1

SAP Error Message - Details

• Message type: E = Error

• Message class: AO - Appropriation requests - Master data / Customizing

• Message number: 170

• Message text: The master data lock was removed for &1

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message AO170 - The master data lock was removed for &1 ?

  The SAP error message AO170, which states "The master data lock was removed for &1," typically occurs in the context of SAP's Asset Accounting (FI-AA) module. This message indicates that a lock on a piece of master data (such as an asset) has been released, which can happen for various reasons.
  Cause:
  
  Concurrent Access: The error often arises when multiple users or processes are trying to access or modify the same asset master data simultaneously. If one user releases the lock, others may receive this message.
  Session Timeout: If a user session times out or is terminated unexpectedly, the lock on the master data may be released.
  Manual Lock Release: An administrator or user may have manually released the lock on the asset data.
  System Errors: Occasionally, system errors or inconsistencies can lead to unexpected lock releases.
  
  Solution:
  
  Retry the Operation: If you encounter this message, try to perform the operation again after a short wait. This may resolve the issue if it was due to a temporary lock.
  Check for Concurrent Users: Investigate if other users are accessing the same asset. If possible, coordinate with them to avoid simultaneous changes.
  Review Lock Entries: Use transaction code SM12 to check for existing locks on the asset. You can see who is holding the lock and take appropriate action.
  Session Management: Ensure that user sessions are managed properly to avoid timeouts. Users should log out properly to release locks.
  Consult with IT Support: If the issue persists, it may be necessary to consult with your SAP Basis or IT support team to investigate any underlying system issues or to check for any recent changes in the system configuration.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as AS01 (Create Asset), AS02 (Change Asset), and AS03 (Display Asset) to understand where the error might be occurring.
  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 Asset Accounting and master data management for best practices on handling locks and concurrent access.
  
  By following these steps, you should be able to address the AO170 error effectively.