How To Fix CN671 - Last selected activity already reached

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 671

• Message text: Last selected activity 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.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN671 - Last selected activity already reached ?

  The SAP error message CN671: Last selected activity already reached typically occurs in the context of project management within SAP, particularly when working with network activities in the Project System (PS) module. This error indicates that the user is trying to perform an action on a network activity that has already been completed or is at its final stage.
  Cause:
  
  Activity Completion: The user is attempting to select or process an activity that has already been marked as completed.
  Incorrect Navigation: The user may be trying to navigate to an activity that is not available for further processing.
  System Configuration: There may be specific configurations or settings in the project that restrict further actions on completed activities.
  
  Solution:
  
  Check Activity Status: Verify the status of the activity in question. If it is marked as completed, you will not be able to select it for further processing.
  Review Project Structure: Ensure that you are navigating through the project structure correctly. If you need to access a different activity, make sure you are selecting the correct one.
  Use the Correct Transaction: Make sure you are using the appropriate transaction code for the action you are trying to perform. For example, if you are trying to change an activity, ensure you are in the correct mode (e.g., change mode instead of display mode).
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to handle completed activities within the Project System.
  Contact Support: If the issue persists and you believe it is not due to user error, consider reaching out to your SAP support team for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CN21 (Create Network), and CN22 (Change Network) to manage project activities effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Ensure that users are trained on the proper procedures for managing project activities to minimize the occurrence of this error.
  
  By following these steps, you should be able to resolve the CN671 error and continue working with your project activities in SAP.