How To Fix CN840 - Relationship is being processed with change number &

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 840

• Message text: Relationship is being processed with change number &

What causes this issue?

The relationship has already been edited with change number &V1&. In
this situation, you cannot delete the relationship.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX

How to fix this error?

You can delete the relationship only when you use a new or different
change number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN840 - Relationship is being processed with change number & ?

  The SAP error message CN840 indicates that a relationship is currently being processed with a specific change number. This typically occurs in the context of project management or change management within SAP, particularly when dealing with network activities, relationships, or dependencies between tasks.
  Cause:
  
  Concurrent Processing: The error often arises when multiple users or processes are trying to modify the same relationship or object simultaneously. This can happen in a collaborative environment where several users are working on the same project or change request.
  Change Management: The relationship is linked to a change number that is currently being processed, meaning that the system is preventing changes to ensure data integrity.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a relationship is locked for editing by another user or process, you will encounter this error.
  
  Solution:
  
  Check for Locks: Use transaction code SM12 to check for any locks on the object or relationship. If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  Wait and Retry: If the relationship is being processed by another user, you may need to wait until they complete their changes. You can then retry your operation.
  Review Change Management Process: Ensure that the change number associated with the relationship is not in a state that prevents further modifications. You may need to check the status of the change number in transaction CN22 or CN21.
  Consult with Team Members: If you are working in a team, communicate with your colleagues to determine if someone else is currently working on the same relationship or change number.
  System Logs: Check system logs for any additional information related to the error. This can provide insights into what might be causing the lock or issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN22 (Change Number Management), CN21 (Create Change Number), and SM12 (Display and Delete Locks).
  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 project management and change management for best practices and guidelines on handling relationships and change numbers.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact your SAP support team for further assistance.