How To Fix CN679 - You can only align with the start or finish date in a network

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 679

• Message text: You can only align with the start or finish date in a network

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN679 - You can only align with the start or finish date in a network ?

  The SAP error message CN679, "You can only align with the start or finish date in a network," typically occurs in the context of project management and network planning within SAP. This error arises when there is an attempt to align activities in a network that is not compatible with the defined start or finish dates of the activities involved.
  Cause:
  
  Incorrect Alignment Attempt: The user is trying to align an activity with a date that does not correspond to the start or finish of the activity in the network.
  Network Structure Issues: The network may have constraints or dependencies that prevent the alignment of activities as intended.
  Date Constraints: The dates being used for alignment may not be valid due to project scheduling constraints or dependencies between tasks.
  
  Solution:
  
  Check Activity Dates: Review the start and finish dates of the activities involved in the network. Ensure that the alignment is being attempted with the correct dates.
  Adjust Dependencies: If there are dependencies between activities, ensure that they are correctly defined. You may need to adjust the sequence or dependencies to allow for proper alignment.
  Use Correct Alignment Options: When aligning activities, make sure to select the appropriate option (start or finish) that corresponds to the intended alignment.
  Review Network Configuration: Check the overall configuration of the network to ensure that it allows for the desired alignment. This may involve reviewing the network's structure and any constraints that may be in place.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on network planning and alignment procedures.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN21 (Create Network), CN22 (Change Network), and CN24 (Display Network) to manage networks effectively.
  SAP Notes: Check for any SAP Notes related to this error message for additional insights or patches that may address specific issues.
  Training and Support: If the issue persists, consider reaching out to your SAP support team or consulting with a professional who specializes in SAP project management.
  
  By following these steps, you should be able to resolve the CN679 error and successfully align activities within your SAP network.