How To Fix CN628 - Standard network contains no relationships

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 628

• Message text: Standard network contains no relationships

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN628 - Standard network contains no relationships ?

  The SAP error message CN628 ("Standard network contains no relationships") typically occurs in the context of project management and network planning within SAP, particularly when working with networks in the Project System (PS) module. This error indicates that the standard network you are trying to work with does not have any relationships defined between the activities.
  Causes:
  
  No Relationships Defined: The most common cause is that the standard network you are trying to use does not have any relationships (dependencies) between its activities.
  Incorrect Network Type: The network type may not be set up correctly, or it may not be intended to have relationships.
  Data Entry Error: There may have been an error during the creation of the network, leading to missing relationships.
  Network Deletion: Relationships may have been deleted or not copied over from a template or standard network.
  
  Solutions:
  
  
  Check Network Relationships:
  
  Go to the network in question and check the relationships between activities. You can do this by navigating to the network in the SAP GUI and reviewing the activity details.
  If there are no relationships, you will need to create them. Use the "Change" mode to add relationships between the activities.
  
  
  
  Create Relationships:
  
  If you find that there are no relationships, you can create them by selecting the activities and defining the type of relationship (e.g., Finish-to-Start, Start-to-Start, etc.) that is appropriate for your project.
  
  
  
  Review Network Configuration:
  
  Ensure that the network type is configured correctly and is intended to have relationships. You may need to consult with your SAP administrator or project manager for guidance on the correct setup.
  
  
  
  Use a Template:
  
  If you are creating a new network, consider using an existing network as a template that already has the necessary relationships defined.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional guidance on setting up networks and relationships in the Project System module.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like CN21 (Create Network), CN22 (Change Network), and CN23 (Display Network) to manage networks.
  Network Types: Familiarize yourself with different network types and their intended use cases within your organization.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message, as there may be specific fixes or updates available.
  
  If the problem persists after trying these solutions, it may be beneficial to reach out to your SAP support team for further assistance.