How To Fix /PLMI/ECN_SP001 - Only change number headers can be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/ECN_SP -

• Message number: 001

• Message text: Only change number headers can be locked

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 /PLMI/ECN_SP001 - Only change number headers can be locked ?

  The SAP error message /PLMI/ECN_SP001: Only change number headers can be locked typically occurs in the context of change management within SAP, particularly when dealing with Engineering Change Numbers (ECNs). This error indicates that the system is trying to lock a change number item instead of the change number header, which is not allowed.
  Cause:
  
  Incorrect Locking Attempt: The error arises when there is an attempt to lock a change number item rather than the change number header. In SAP, only the header of a change number can be locked to prevent changes while the change process is ongoing.
  Configuration Issues: There may be configuration settings in the system that are not aligned with the expected behavior for change management.
  User Permissions: The user may not have the necessary permissions to lock the change number header, leading to this error.
  
  Solution:
  
  Lock the Change Number Header: Ensure that you are attempting to lock the correct object. You should be locking the change number header instead of any individual items associated with it.
  Check User Permissions: Verify that the user has the appropriate authorizations to lock change numbers. This may involve checking roles and permissions in the SAP system.
  Review Configuration: If the issue persists, review the configuration settings related to change management in your SAP system. Ensure that they are set up correctly to allow for the locking of change number headers.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling change numbers and locking mechanisms.
  Contact SAP Support: If the problem cannot be resolved through the above steps, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CC01 (Create Change Number), CC02 (Change Change Number), and CC03 (Display Change Number) to manage change numbers effectively.
  Change Management Process: Understanding the overall change management process in SAP can help in identifying where the issue might be occurring.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  
  By following these steps, you should be able to address the error message and ensure proper handling of change numbers in your SAP environment.