How To Fix CN459 - Network '&1': No changes possible because of status &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 459

• Message text: Network '&1': No changes possible because of status &2

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 CN459 - Network '&1': No changes possible because of status &2 ?

  The SAP error message CN459 indicates that there is an issue with a network in the project system (PS) module. Specifically, the message states that no changes can be made to the network because of its current status. The placeholders &1 and &2 represent the network ID and the status code, respectively.
  Cause:
  The error typically occurs when you attempt to make changes to a network that is in a status that does not allow modifications. Common statuses that might trigger this error include:
  
  TECO (Technically Completed): The network has been technically completed, and no further changes can be made.
  CLSD (Closed): The network is closed, indicating that all activities are finished and no changes are allowed.
  REL (Released): The network is released, but certain changes may still be restricted based on configuration.
  
  Solution:
  To resolve this error, you need to check the status of the network and determine if it can be changed. Here are some steps you can take:
  
  
  Check Network Status: Use transaction code CN03N to display the network and check its current status. This will help you understand why changes are not allowed.
  
  
  Change Status: If the network is in a status that prevents changes (like TECO or CLSD), you may need to reverse the status if your business process allows it. This can be done using transaction codes:
  
  TECO to REL: Use transaction code CN21 to change the status from TECO to REL if applicable.
  CLSD to REL: If the network is closed, you may need to reopen it, which typically requires specific authorizations and may not be allowed in all scenarios.
  
  
  
  Consult with Project Management: If you are unsure about changing the status, consult with your project manager or the person responsible for project controls to ensure that it aligns with your organization's policies.
  
  
  Review Configuration: If you frequently encounter this issue, it may be worth reviewing the configuration settings in your SAP system to understand the allowed statuses for networks and whether they align with your business processes.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN01, CN02, CN03, CN21, and CJ20N for managing networks and project structures.
  SAP Documentation: Refer to SAP Help documentation for detailed information on network statuses and their implications.
  User Authorizations: Ensure that you have the necessary authorizations to change network statuses, as this can be restricted based on user roles.
  
  By following these steps, you should be able to address the CN459 error and make the necessary changes to the network in your SAP system.