How To Fix /PM0/ABR_MSG_PLIB004 - A change lock is already set in the same internal mode

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABR_MSG_PLIB -

• Message number: 004

• Message text: A change lock is already set in the same internal mode

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ABR_MSG_PLIB004 - A change lock is already set in the same internal mode ?

  The SAP error message /PM0/ABR_MSG_PLIB004 indicates that a change lock is already set in the same internal mode. This typically occurs in the context of SAP's Project Management or similar modules where multiple users or processes may attempt to make changes to the same object or data simultaneously.
  Cause:
  
  Concurrent Access: The error usually arises when two or more users or processes try to modify the same data or object at the same time, leading to a conflict.
  Long-Running Transactions: If a transaction takes too long to complete, it may hold a lock on the data, preventing other transactions from accessing it.
  Improper Lock Release: Sometimes, locks may not be released properly due to errors or interruptions in the process.
  
  Solution:
  
  Wait and Retry: If the error is due to concurrent access, waiting for a few moments and then retrying the operation may resolve the issue.
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find a lock that is no longer needed, you can delete it (ensure that you have the necessary authorizations and that it is safe to do so).
  Review Long-Running Transactions: Identify any long-running transactions that may be holding locks and optimize them if possible.
  User Coordination: If multiple users are working on the same data, coordinate with them to avoid simultaneous changes.
  System Configuration: In some cases, it may be necessary to review the system configuration or consult with your SAP Basis team to ensure that locking mechanisms are functioning correctly.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (for system logs), and ST22 (for dumps) to diagnose issues further.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP's support portal can provide additional insights.
  Documentation: Review SAP documentation related to the specific module you are working with, as it may provide additional context on locking behavior and best practices.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.