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

CN840 - Overview

• 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.

CN840 - Details

• 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.