How To Fix CN199 - The relationship type cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 199

• Message text: The relationship type cannot be changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN199 - The relationship type cannot be changed ?

  The SAP error message CN199, which states "The relationship type cannot be changed," typically occurs in the context of project management or network planning within SAP. This error indicates that there is an attempt to modify the relationship type of a network activity or project element that is not allowed due to certain constraints or settings in the system.
  Causes:
  
  Locked Relationships: The relationship type may be locked due to the status of the project or network. For example, if the project is in a certain status (like "Released"), changes to relationships may be restricted.
  Incorrect Configuration: The system configuration may not allow changes to certain relationship types based on the project type or settings.
  Dependencies: There may be dependencies or constraints that prevent changing the relationship type. For instance, if there are other activities that depend on the current relationship, changing it could lead to inconsistencies.
  Authorization Issues: The user may not have the necessary authorizations to make changes to the relationship types.
  
  Solutions:
  
  Check Project Status: Ensure that the project or network is not in a status that restricts changes. If it is, you may need to change the status back to a modifiable state.
  Review Dependencies: Analyze the dependencies of the activities involved. If there are dependent activities, you may need to adjust or remove those dependencies before changing the relationship type.
  Consult Configuration Settings: Review the configuration settings in the project management module to ensure that the system allows for the desired changes. This may require assistance from a system administrator or SAP consultant.
  Authorization Check: Verify that the user has the necessary permissions to make changes to the project or network relationships. If not, the user may need to request additional authorizations.
  Use Alternative Methods: If changing the relationship type is not possible, consider whether there are alternative ways to achieve the desired outcome, such as creating a new relationship or modifying the project structure.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CN22 (Change Network) to navigate and manage project relationships.
  SAP Notes: Check for any SAP Notes related to this error message for specific patches or updates that may address the issue.
  Documentation: Review SAP documentation or help files related to project management and network planning for more detailed guidance on managing relationships.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a professional with expertise in SAP project management.