How To Fix CN122 - Specified assignment to network already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 122

• Message text: Specified assignment to network already exists

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN122 - Specified assignment to network already exists ?

  The SAP error message CN122 ("Specified assignment to network already exists") typically occurs in the context of project systems (PS) or production planning (PP) when you attempt to assign a component or activity to a network that already has an existing assignment for that specific component or activity.
  Cause:
  
  Duplicate Assignment: The most common cause of this error is that the component or activity you are trying to assign to the network is already assigned. SAP does not allow duplicate assignments to ensure data integrity.
  Incorrect Data Entry: There may be a mistake in the data entry, such as trying to assign the same component to the same network multiple times.
  Network Structure: The network structure may not allow for the assignment due to its configuration or status.
  
  Solution:
  
  Check Existing Assignments: Review the existing assignments in the network to confirm if the component or activity is already assigned. You can do this by navigating to the network in question and checking the assignments.
  Remove Duplicate Assignment: If you find that the component or activity is already assigned and you need to make changes, you may need to remove the existing assignment before adding a new one.
  Use Different Components/Activities: If you need to assign a different component or activity, ensure that it is not already assigned to the network.
  Review Network Status: Ensure that the network is in a status that allows for changes. If the network is locked or in a completed status, you may need to change its status before making assignments.
  Consult Documentation: If you are unsure about the network structure or assignment rules, consult the SAP documentation or your organization's SAP guidelines.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CN21 (Create Network), CN22 (Change Network), or CN41 (Display Network) to manage network assignments.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the network and its assignments.
  Consult with Colleagues: If you are part of a team, consult with colleagues who may have experience with similar issues or who manage the project systems.
  
  By following these steps, you should be able to resolve the CN122 error and successfully manage your network assignments in SAP.