How To Fix CN197 - Successor or predecesor in relationships cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 197

• Message text: Successor or predecesor in relationships cannot be changed

What causes this issue?

You cannot change the predecessor and sucessor in relationships.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX

How to fix this error?

Delete the realtionship and create a new one with the changed values.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN197 - Successor or predecesor in relationships cannot be changed ?

  The SAP error message CN197, which states "Successor or predecessor in relationships cannot be changed," typically occurs in the context of project management and network planning within SAP. This error indicates that there is an issue with modifying the relationships between activities in a project network.
  Cause:
  
  Locked Relationships: The relationships between activities (successors and predecessors) may be locked due to the project being in a certain status (e.g., released or completed).
  Dependencies: The system may not allow changes to relationships if there are dependencies that would be violated by the change.
  Project Status: If the project is in a status that does not allow changes (like "Released"), you will not be able to modify the relationships.
  Network Type: Certain types of networks or activities may have restrictions on changing relationships.
  User Authorizations: The user may not have the necessary authorizations to make changes to the project network.
  
  Solution:
  
  Check Project Status: Ensure that the project is not in a status that prevents changes. If it is, you may need to change the status back to a modifiable state.
  Unlock Relationships: If the relationships are locked, you may need to unlock them or change the project status to allow modifications.
  Review Dependencies: Analyze the dependencies between activities to ensure that the changes you are trying to make do not violate any existing constraints.
  User Authorizations: Verify that you have the necessary permissions to modify the project network. If not, contact your SAP administrator to obtain the required authorizations.
  Use Transaction Codes: Use transaction codes like CN21 (Create Network) or CN22 (Change Network) to manage the project network and relationships properly.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing project networks and relationships.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) and CN41 (Network Overview) for managing projects and networks.
  Training and Support: Consider SAP training resources or consulting with an SAP expert for more in-depth understanding and troubleshooting.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or refer to SAP community forums for additional assistance.