How To Fix /PM0/ABP_ACTION051 - Lock cannot be added

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABP_ACTION -

• Message number: 051

• Message text: Lock cannot be added

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ABP_ACTION051 - Lock cannot be added ?

  The SAP error message /PM0/ABP_ACTION051 Lock cannot be added typically occurs in the context of the SAP Plant Maintenance (PM) module, particularly when dealing with maintenance orders or notifications. This error indicates that there is an issue with locking mechanisms in the system, which can prevent certain actions from being performed.
  Causes:
  
  Concurrent Access: The error may arise when multiple users or processes are trying to access or modify the same object simultaneously, leading to a conflict in locking.
  System Configuration: There may be issues with the configuration of the locking mechanism in the SAP system.
  Database Locks: Sometimes, database locks can prevent the addition of new locks, especially if a transaction is not properly committed or rolled back.
  User Authorizations: Insufficient authorizations for the user trying to perform the action can also lead to this error.
  
  Solutions:
  
  Check for Concurrent Sessions: Ensure that no other users are currently accessing the same object. If they are, you may need to wait until they finish their transactions.
  Review Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find any unnecessary locks, you can delete them (if you have the necessary authorizations).
  Transaction Management: Ensure that all transactions are properly committed or rolled back. If a transaction is left open, it can hold locks that prevent others from proceeding.
  User Authorizations: Verify that the user has the necessary authorizations to perform the action. If not, you may need to adjust the user roles or permissions.
  System Configuration: Consult with your SAP Basis team to review the configuration of the locking mechanism and ensure it is set up correctly.
  Restart the Session: Sometimes, simply logging out and back into the SAP system can resolve temporary locking issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (for lock entries), SM21 (for system logs), and ST22 (for dumps) to diagnose issues further.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP documentation for the PM module to understand how locking works in the context of maintenance orders and notifications.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.