How To Fix CN814 - Activity & cannot have a relationship to itself

CN814 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 814

• Message text: Activity & cannot have a relationship to itself

What causes this issue?

You have entered a relationship for the same activity that you have
selected for maintaining relationships.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Enter a different activity for the relationship.

Error message extract from SAP system. Copyright SAP SE.

CN814 - Details

• The SAP error message CN814 ("Activity & cannot have a relationship to itself") typically occurs in the context of project management within SAP, particularly when dealing with network activities in Project System (PS) or when managing work breakdown structures (WBS). This error indicates that there is an attempt to create a relationship (dependency) between an activity and itself, which is not allowed.
  
  Cause:
  
  Self-Referencing Relationship: The most common cause of this error is that a user is trying to establish a predecessor or successor relationship where the same activity is being referenced. For example, if Activity A is set to start after Activity A, it creates a circular reference that is logically incorrect.
  
  
  Solution:
  
  
  Check Relationships: Review the relationships defined for the activity in question. Ensure that you are not trying to link the activity to itself. 
  
  Go to the network or activity details and check the "Relationships" tab.
  Remove any self-referencing relationships.
  
  
  
  Correct Activity Links: