How To Fix CN670 - First selected activity already reached

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 670

• Message text: First 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN670 - First selected activity already reached ?

  The SAP error message CN670 ("First selected activity already reached") typically occurs in the context of project management and network planning within SAP. This error indicates that the system has detected that the first selected activity in a network or project has already been reached or completed, which can prevent further processing or scheduling of subsequent activities.
  Cause:
  
  Activity Status: The first selected activity may already be marked as completed or in progress, which means that the system cannot allow further actions that assume it is not yet started.
  Network Logic: The network logic may not allow for the selected activity to be processed again if it has already been executed.
  Incorrect Selection: The user may have selected an activity that is not appropriate for the current operation, such as trying to reschedule or reprocess an activity that is already in a completed state.
  
  Solution:
  
  Check Activity Status: Verify the status of the first selected activity. If it is completed, you may need to select a different activity that is still pending or not yet started.
  Review Network Logic: Ensure that the network logic is correctly set up. If the activity should be available for processing, check if there are any constraints or dependencies that are preventing it from being selected.
  Adjust Selection: If you are trying to perform an operation that is not valid for the selected activity, adjust your selection to choose an appropriate activity that can be processed.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the project management module you are using, as there may be additional context or settings that need to be adjusted.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CN41 (Network Overview) to navigate and manage project activities effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are addressed in later updates.
  User Permissions: Ensure that you have the necessary permissions to modify or interact with the selected activities in the project.
  
  If the issue persists after checking these aspects, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in project systems for further assistance.