How To Fix CN656 - Last selected relationship already reached

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 656

• Message text: Last selected relationship already reached

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN656 - Last selected relationship already reached ?

  The SAP error message CN656: Last selected relationship already reached typically occurs in the context of project management or network planning within the SAP system, particularly when working with the Project System (PS) module. This error indicates that the user is trying to navigate through relationships in a network or project structure, but has reached the end of the available relationships.
  Cause:
  
  Navigational Limitations: The error arises when the user attempts to navigate to a predecessor or successor that does not exist or has already been reached.
  Incorrect Relationship Setup: The relationships between activities or tasks may not be set up correctly, leading to a situation where there are no further relationships to traverse.
  Data Integrity Issues: There may be issues with the integrity of the data in the project structure, such as missing or incorrectly defined relationships.
  
  Solution:
  
  
  Check Relationships: Review the relationships defined in the project or network. Ensure that all necessary predecessors and successors are correctly defined.
  
  Go to the project or network in question and check the relationships in the network diagram or activity list.
  
  
  
  Use Navigation Options: If you are using a navigation function (like "Next" or "Previous"), ensure that you are not trying to navigate beyond the available relationships. Use the appropriate buttons or options to navigate correctly.
  
  
  Review Project Structure: Ensure that the project structure is complete and that all activities are linked correctly. If necessary, add or modify relationships to ensure proper navigation.
  
  
  Check for Data Consistency: Run consistency checks on the project or network to identify any issues with the data. This can often be done through transaction codes like CJ20N (Project Builder) or CN22 (Network).
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing relationships in the Project System.
  
  
  Contact Support: If the issue persists and you cannot identify the cause, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CN22 (Network), and CN41 (Network Overview) to manage and review project structures and relationships.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Ensure that users are trained on how to properly set up and navigate project relationships to minimize the occurrence of this error.
  
  By following these steps, you should be able to resolve the CN656 error and ensure that your project relationships are correctly configured.