How To Fix CN815 - Standard network has several alternatives. Choose one

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 815

• Message text: Standard network has several alternatives. Choose one

What causes this issue?

You must maintain an alternative in order to maintain a relationship
to another standard network.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG

How to fix this error?

Enter a key for the alternative to the standard network.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN815 - Standard network has several alternatives. Choose one ?

  The SAP error message CN815 indicates that a standard network has multiple alternatives, and the system requires the user to select one of them. This typically occurs in the context of project management or network planning within SAP, particularly when dealing with networks in the Project System (PS) module.
  Cause:
  The error arises when:
  
  A standard network (a predefined sequence of activities) has been defined with multiple alternative paths or options for execution.
  The system cannot determine which alternative to use for processing, leading to the need for user intervention.
  
  Solution:
  To resolve the CN815 error, follow these steps:
  
  
  Identify the Standard Network: Determine which standard network is causing the issue. You can do this by checking the network number or the project details.
  
  
  Review Alternatives: Access the standard network in the SAP system and review the available alternatives. You can do this by navigating to the network in the Project System module.
  
  
  Select an Alternative:
  
  If you are in a transaction that allows you to choose an alternative, you will typically see a list of available alternatives.
  Select the appropriate alternative that you want to use for your project or network execution.
  
  
  
  Save Changes: After selecting the desired alternative, ensure you save your changes to avoid encountering the error again.
  
  
  Check Dependencies: If applicable, check if there are any dependencies or constraints that might affect the selection of alternatives.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CN21 (Create Network) or CN22 (Change Network) to manage networks and their alternatives.
  Documentation: Refer to SAP documentation or help files for detailed information on managing standard networks and alternatives.
  User Roles: Ensure that you have the necessary permissions to modify networks and select alternatives in the SAP system.
  Training: If you frequently encounter this error, consider training sessions on SAP Project System functionalities to better understand how to manage networks and alternatives.
  
  By following these steps, you should be able to resolve the CN815 error and continue with your project planning or execution in SAP.