How To Fix CN668 - First selected material component already reached

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 668

• Message text: First selected material component already reached

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 CN668 - First selected material component already reached ?

  The SAP error message CN668 ("First selected material component already reached") typically occurs in the context of project management and material requirements planning within SAP, particularly when dealing with network activities and components in a project.
  Cause:
  This error usually arises when you are trying to assign a material component to a project or network activity, but the system has already reached the maximum limit for that component. This can happen due to:
  
  Duplicate Assignments: The same material component is being assigned multiple times to the same activity or project.
  Configuration Limits: There may be configuration settings that limit the number of times a specific component can be assigned.
  Project Structure: The project structure may not allow for additional components to be added due to its current state or configuration.
  
  Solution:
  To resolve the CN668 error, you can take the following steps:
  
  
  Check Assignments: Review the current assignments of material components to the project or network activity. Ensure that you are not trying to assign the same component more than once.
  
  
  Review Configuration: Check the configuration settings related to material components in your project. There may be limits set on how many times a component can be assigned.
  
  
  Adjust Project Structure: If the project structure is causing the issue, consider modifying it to allow for additional components. This may involve changing the hierarchy or the way components are linked to activities.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling material components in your version of SAP.
  
  
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration and usage.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN21 (Create Work Breakdown Structure), CN22 (Change Work Breakdown Structure), and CN41 (Display Project).
  SAP Notes: Check for any SAP Notes related to error CN668 for potential patches or updates that may address the issue.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the CN668 error and implement a solution to resolve it.